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Dicen por ahí que Newton construyó este puente, que une dos partes del Queen's College, sin utilizar ni un solo clavo. Y que más tarde, unos estudiantes lo desmontaron para analizar su estructura e intentaron volver a construirlo, pero fueron incapaces y necesitaron tornillos para dejarlo como estaba.
Crisp hexagons and all the symbols of mathematical knowledge.
Click the large size to appreciate the mid-century stylin' of this Golden Library edition of "Mathematics: The Story of Numbers, Symbols and Space," copyright 1958.
This nearly mint copy (just a few scuffs and page yellowing because of the paper grade) has awesome illustrations made by the amazingly talented Lowell Hess. Text by Irving Adler.
artwork for Musical Mathematics cover - www.musicalmathematics.bigcartel.com/product/pre-order-zi...
++++++++++ FROM WKIPEDIA +++++++++
Kolkata /koʊlˈkɑːtə/ ([kolkata] (About this soundlisten), also known as Calcutta /kælˈkʌtə/, the official name until 2001) is the capital of the Indian state of West Bengal. Located on the east bank of the Hooghly River approximately 75 kilometres (47 mi) west of the border with Bangladesh, it is the principal commercial, cultural, and educational centre of East India, while the Port of Kolkata is India's oldest operating port and its sole major riverine port. The city is widely regarded as the "cultural capital" of India, and is also nicknamed the "City of Joy".[1][2][3].According to the 2011 Indian census, it is the seventh most populous city. the city had a population of 4.5 million, while the population of the city and its suburbs was 14.1 million, making it the third-most populous metropolitan area in India. Recent estimates of Kolkata Metropolitan Area's economy have ranged from $60 to $150 billion (GDP adjusted for purchasing power parity) making it third most-productive metropolitan area in India, after Mumbai and Delhi.[11][12][13]
In the late 17th century, the three villages that predated Calcutta were ruled by the Nawab of Bengal under Mughal suzerainty. After the Nawab granted the East India Company a trading licence in 1690,[15] the area was developed by the Company into an increasingly fortified trading post. Nawab Siraj ud-Daulah occupied Calcutta in 1756, and the East India Company retook it the following year. In 1793 the East India company was strong enough to abolish Nizamat (local rule), and assumed full sovereignty of the region. Under the company rule, and later under the British Raj, Calcutta served as the capital of British-held territories in India until 1911, when its perceived geographical disadvantages, combined with growing nationalism in Bengal, led to a shift of the capital to New Delhi. Calcutta was the centre for the Indian independence movement; it remains a hotbed of contemporary state politics. Following Indian independence in 1947, Kolkata, which was once the centre of modern Indian education, science, culture, and politics, suffered several decades of economic stagnation.
As a nucleus of the 19th- and early 20th-century Bengal Renaissance and a religiously and ethnically diverse centre of culture in Bengal and India, Kolkata has local traditions in drama, art, film, theatre, and literature. Many people from Kolkata—among them several Nobel laureates—have contributed to the arts, the sciences, and other areas. Kolkata culture features idiosyncrasies that include distinctively close-knit neighbourhoods (paras) and freestyle intellectual exchanges (adda). West Bengal's share of the Bengali film industry is based in the city, which also hosts venerable cultural institutions of national importance, such as the Academy of Fine Arts, the Victoria Memorial, the Asiatic Society, the Indian Museum and the National Library of India. Among professional scientific institutions, Kolkata hosts the Agri Horticultural Society of India, the Geological Survey of India, the Botanical Survey of India, the Calcutta Mathematical Society, the Indian Science Congress Association, the Zoological Survey of India, the Institution of Engineers, the Anthropological Survey of India and the Indian Public Health Association. Though home to major cricketing venues and franchises, Kolkata differs from other Indian cities by giving importance to association football and other sports.
Etymology
The word Kolkata derives from the Bengali term Kôlikata (Bengali: কলিকাতা) [ˈkɔlikat̪a], the name of one of three villages that predated the arrival of the British, in the area where the city eventually was to be established; the other two villages were Sutanuti and Govindapur.[16]
There are several explanations about the etymology of this name:
The term Kolikata is thought to be a variation of Kalikkhetrô [ˈkalikʰːet̪rɔ] (Bengali: কালীক্ষেত্র), meaning "Field of [the goddess] Kali". Similarly, it can be a variation of 'Kalikshetra' (Sanskrit: कालीक्षेत्र, lit. "area of Goddess Kali").
Another theory is that the name derives from Kalighat.[17]
Alternatively, the name may have been derived from the Bengali term kilkila (Bengali: কিলকিলা), or "flat area".[18]
The name may have its origin in the words khal [ˈkʰal] (Bengali: খাল) meaning "canal", followed by kaṭa [ˈkata] (Bengali: কাটা), which may mean "dug".[19]
According to another theory, the area specialised in the production of quicklime or koli chun [ˈkɔlitɕun] (Bengali: কলি চুন) and coir or kata [ˈkat̪a] (Bengali: কাতা); hence, it was called Kolikata [ˈkɔlikat̪a] (Bengali: কলিকাতা).[18]
Although the city's name has always been pronounced Kolkata [ˈkolkat̪a] (Bengali: কলকাতা) or Kôlikata [ˈkɔlikat̪a] (Bengali: কলিকাতা) in Bengali, the anglicised form Calcutta was the official name until 2001, when it was changed to Kolkata in order to match Bengali pronunciation.[20] (It should be noted that "Calcutt" is an etymologically unrelated place name found at several locations in England.)
History
The discovery and archaeological study of Chandraketugarh, 35 kilometres (22 mi) north of Kolkata, provide evidence that the region in which the city stands has been inhabited for over two millennia.[21][22] Kolkata's recorded history began in 1690 with the arrival of the English East India Company, which was consolidating its trade business in Bengal. Job Charnock, an administrator who worked for the company, was formerly credited as the founder of the city;[23] In response to a public petition,[24] the Calcutta High Court ruled in 2003 that the city does not have a founder.[25] The area occupied by the present-day city encompassed three villages: Kalikata, Gobindapur, and Sutanuti. Kalikata was a fishing village; Sutanuti was a riverside weavers' village. They were part of an estate belonging to the Mughal emperor; the jagirdari (a land grant bestowed by a king on his noblemen) taxation rights to the villages were held by the Sabarna Roy Choudhury family of landowners, or zamindars. These rights were transferred to the East India Company in 1698.[26]:1
In 1712, the British completed the construction of Fort William, located on the east bank of the Hooghly River to protect their trading factory.[27] Facing frequent skirmishes with French forces, the British began to upgrade their fortifications in 1756. The Nawab of Bengal, Siraj ud-Daulah, condemned the militarisation and tax evasion by the company. His warning went unheeded, and the Nawab attacked; he captured Fort William which led to the killings of several East India company officials in the Black Hole of Calcutta.[28] A force of Company soldiers (sepoys) and British troops led by Robert Clive recaptured the city the following year.[28] Per the 1765 Treaty of Allahabad following the battle of Buxar, East India company was appointed imperial tax collector of the Mughal emperor in the province of Bengal, Bihar and Orissa, while Mughal-appointed Nawabs continued to rule the province.[29] Declared a presidency city, Calcutta became the headquarters of the East India Company by 1773.[30] In 1793, ruling power of the Nawabs were abolished and East India company took complete control of the city and the province. In the early 19th century, the marshes surrounding the city were drained; the government area was laid out along the banks of the Hooghly River. Richard Wellesley, Governor-General of the Presidency of Fort William between 1797 and 1805, was largely responsible for the development of the city and its public architecture.[31] Throughout the late 18th and 19th century, the city was a centre of the East India Company's opium trade.[32]
By the 1850s, Calcutta had two areas: White Town, which was primarily British and centred on Chowringhee and Dalhousie Square; and Black Town, mainly Indian and centred on North Calcutta.[33] The city underwent rapid industrial growth starting in the early 1850s, especially in the textile and jute industries; this encouraged British companies to massively invest in infrastructure projects, which included telegraph connections and Howrah railway station. The coalescence of British and Indian culture resulted in the emergence of a new babu class of urbane Indians, whose members were often bureaucrats, professionals, newspaper readers, and Anglophiles; they usually belonged to upper-caste Hindu communities.[34] In the 19th century, the Bengal Renaissance brought about an increased sociocultural sophistication among city denizens. In 1883, Calcutta was host to the first national conference of the Indian National Association, the first avowed nationalist organisation in India.[35]
Bengali billboards on Harrison Street. Calcutta was the largest commercial centre in British India.
The partition of Bengal in 1905 along religious lines led to mass protests, making Calcutta a less hospitable place for the British.[36][37] The capital was moved to New Delhi in 1911.[38] Calcutta continued to be a centre for revolutionary organisations associated with the Indian independence movement. The city and its port were bombed several times by the Japanese between 1942 and 1944, during World War II.[39][40] Coinciding with the war, millions starved to death during the Bengal famine of 1943 due to a combination of military, administrative, and natural factors.[41] Demands for the creation of a Muslim state led in 1946 to an episode of communal violence that killed over 4,000.[42][43][44] The partition of India led to further clashes and a demographic shift—many Muslims left for East Pakistan (present day Bangladesh), while hundreds of thousands of Hindus fled into the city.[45]
During the 1960s and 1970s, severe power shortages, strikes, and a violent Marxist–Maoist movement by groups known as the Naxalites damaged much of the city's infrastructure, resulting in economic stagnation.[46] The Bangladesh Liberation War of 1971 led to a massive influx of thousands of refugees, many of them penniless, that strained Kolkata's infrastructure.[47] During the mid-1980s, Mumbai (then called Bombay) overtook Kolkata as India's most populous city. In 1985, prime minister Rajiv Gandhi dubbed Kolkata a "dying city" in light of its socio-political woes.[48] In the period 1977–2011, West Bengal was governed from Kolkata by the Left Front, which was dominated by the Communist Party of India (CPM). It was the world's longest-serving democratically elected communist government, during which Kolkata was a key base for Indian communism.[49][50][51] In the West Bengal Legislative Assembly election, 2011, Left Front was defeated by the Trinamool Congress. The city's economic recovery gathered momentum after the 1990s, when India began to institute pro-market reforms. Since 2000, the information technology (IT) services sector has revitalised Kolkata's stagnant economy. The city is also experiencing marked growth in its manufacturing base.[52]
Geography
Spread roughly north–south along the east bank of the Hooghly River, Kolkata sits within the lower Ganges Delta of eastern India approximately 75 km (47 mi) west of the international border with Bangladesh; the city's elevation is 1.5–9 m (5–30 ft).[53] Much of the city was originally a wetland that was reclaimed over the decades to accommodate a burgeoning population.[54] The remaining undeveloped areas, known as the East Kolkata Wetlands, were designated a "wetland of international importance" by the Ramsar Convention (1975).[55] As with most of the Indo-Gangetic Plain, the soil and water are predominantly alluvial in origin. Kolkata is located over the "Bengal basin", a pericratonic tertiary basin.[56] Bengal basin comprises three structural units: shelf or platform in the west; central hinge or shelf/slope break; and deep basinal part in the east and southeast. Kolkata is located atop the western part of the hinge zone which is about 25 km (16 mi) wide at a depth of about 45,000 m (148,000 ft) below the surface.[56] The shelf and hinge zones have many faults, among them some are active. Total thickness of sediment below Kolkata is nearly 7,500 m (24,600 ft) above the crystalline basement; of these the top 350–450 m (1,150–1,480 ft) is Quaternary, followed by 4,500–5,500 m (14,760–18,040 ft) of Tertiary sediments, 500–700 m (1,640–2,300 ft) trap wash of Cretaceous trap and 600–800 m (1,970–2,620 ft) Permian-Carboniferous Gondwana rocks.[56] The quaternary sediments consist of clay, silt, and several grades of sand and gravel. These sediments are sandwiched between two clay beds: the lower one at a depth of 250–650 m (820–2,130 ft); the upper one 10–40 m (30–130 ft) in thickness.[57] According to the Bureau of Indian Standards, on a scale ranging from I to V in order of increasing susceptibility to earthquakes, the city lies inside seismic zone III.[58]
Urban structure
Howrah Bridge from the western bank of the Ganges
The Kolkata metropolitan area is spread over 1,886.67 km2 (728.45 sq mi)[59]:7 and comprises 3 municipal corporations (including Kolkata Municipal Corporation), 39 local municipalities and 24 panchayat samitis, as of 2011.[59]:7 The urban agglomeration encompassed 72 cities and 527 towns and villages, as of 2006.[60] Suburban areas in the Kolkata metropolitan area incorporate parts of the following districts: North 24 Parganas, South 24 Parganas, Howrah, Hooghly, and Nadia.[61]:15 Kolkata, which is under the jurisdiction of the Kolkata Municipal Corporation (KMC), has an area of 185 km2 (71 sq mi).[60] The east–west dimension of the city is comparatively narrow, stretching from the Hooghly River in the west to roughly the Eastern Metropolitan Bypass in the east—a span of 9–10 km (5.6–6.2 mi).[62] The north–south distance is greater, and its axis is used to section the city into North, Central, and South Kolkata. East Kolkata is also a section.
North Kolkata is the oldest part of the city. Characterised by 19th-century architecture, dilapidated buildings, overpopulated slums, crowded bazaars, and narrow alleyways, it includes areas such as Shyambazar, Hatibagan, Maniktala, Kankurgachi, Rajabazar, Shobhabazar, Shyampukur, Sonagachi, Kumortuli, Bagbazar, Jorasanko, Chitpur, Pathuriaghata, Cossipore, Kestopur, Sinthee, Belgachia, Jorabagan, and Dum Dum.[63]:65–66 The northern suburban areas like Baranagar, Durganagar, Noapara, Dunlop, Dakshineswar, Nagerbazar, Belghoria, Agarpara, Sodepur, Madhyamgram, Barasat, Birati, Khardah up to Barrackpur are also within the city of Kolkata (as a metropolitan structure).
Central Kolkata
Central Kolkata hosts the central business district. It contains B. B. D. Bagh, formerly known as Dalhousie Square, and the Esplanade on its east; Strand Road is on its west.[64] The West Bengal Secretariat, General Post Office, Reserve Bank of India, High Court, Lalbazar Police Headquarters, and several other government and private offices are located there. Another business hub is the area south of Park Street, which comprises thoroughfares such as Chowringhee, Camac Street, Wood Street, Loudon Street, Shakespeare Sarani, and A. J. C. Bose Road.[65] The Maidan is a large open field in the heart of the city that has been called the "lungs of Kolkata"[66] and accommodates sporting events and public meetings.[67] The Victoria Memorial and Kolkata Race Course are located at the southern end of the Maidan. Other important areas of Central Kolkata are Park Circus, Burrabazar, College Street, Sealdah, Taltala, Janbazar, Bowbazar, Entally, Chandni Chowk, Lalbazar, Chowringhee, Dharmatala, Tiretta Bazar, Bow Barracks, Mullick Bazar, Park Circus, Babughat etc. Among the other parks are Central Park in Bidhannagar and Millennium Park on Strand Road, along the Hooghly River.
South Kolkata
South Kolkata developed after India gained independence in 1947; it includes upscale neighbourhoods such as Ballygunge, Alipore, New Alipore, Lansdowne, Bhowanipore, Kalighat, Dhakuria, Gariahat, Tollygunge, Naktala, Jodhpur Park, Lake Gardens, Golf Green, Jadavpur, Garfa, Kalikapur, Haltu, Nandi Bagan, Santoshpur, Baghajatin, Garia, Ramgarh, Raipur, Kanungo Park, Ranikuthi, Bikramgarh, Bijoygarh, Bansdroni and Kudghat.[16] Outlying areas of South Kolkata include Garden Reach, Khidirpur, Metiabruz, Taratala, Majerhat, Budge Budge, Behala, Sarsuna, Barisha, Parnasree Pally, Thakurpukur, Maheshtala and Joka. The southern suburban neighbourhoods like Mahamayatala, Pratapgarh, Kamalgazi, Narendrapur, Sonarpur, Subhashgram and Baruipur are also within the city of Kolkata (as metropolitan, urban agglomeration area). Fort William, on the western part of the city, houses the headquarters of the Eastern Command of the Indian Army;[68] its premises are under the jurisdiction of the army.
East Kolkata
East Kolkata is largely composed of newly developed areas and neighbourhoods of Saltlake, Rajarhat, Tangra, Topsia, Kasba, Anandapur, Mukundapur, Picnic Garden, Beleghata, Ultadanga, Phoolbagan, Kaikhali, Lake Town, etc. Two planned townships in the greater Kolkata region are Bidhannagar, also known as Salt Lake City and located north-east of the city; and Rajarhat, also called New Town and sited east of Bidhannagar.[16][69] In the 2000s, Sector V in Bidhannagar developed into a business hub for information technology and telecommunication companies.[70][71] Both Bidhannagar and New Town are situated outside the Kolkata Municipal Corporation limits, in their own municipalities.[69]
Climate
Kolkata is subject to a tropical wet-and-dry climate that is designated Aw under the Köppen climate classification. According to a United Nations Development Programme report, its wind and cyclone zone is "very high damage risk".[58]
Temperature
The annual mean temperature is 26.8 °C (80.2 °F); monthly mean temperatures are 19–30 °C (66–86 °F). Summers (March–June) are hot and humid, with temperatures in the low 30s Celsius; during dry spells, maximum temperatures often exceed 40 °C (104 °F) in May and June.[72] Winter lasts for roughly two-and-a-half months, with seasonal lows dipping to 9–11 °C (48–52 °F) in December and January. May is the hottest month, with daily temperatures ranging from 27–37 °C (81–99 °F); January, the coldest month, has temperatures varying from 12–23 °C (54–73 °F). The highest recorded temperature is 43.9 °C (111.0 °F), and the lowest is 5 °C (41 °F).[72] The winter is mild and very comfortable weather pertains over the city throughout this season. Often, in April–June, the city is struck by heavy rains or dusty squalls that are followed by thunderstorms or hailstorms, bringing cooling relief from the prevailing humidity. These thunderstorms are convective in nature, and are known locally as kal bôishakhi (কালবৈশাখী), or "Nor'westers" in English.[73]
Rains brought by the Bay of Bengal branch of the south-west summer monsoon[74] lash Kolkata between June and September, supplying it with most of its annual rainfall of about 1,850 mm (73 in). The highest monthly rainfall total occurs in July and August. In these months often incessant rain for days brings live to a stall for the city dwellers. The city receives 2,528 hours of sunshine per year, with maximum sunlight exposure occurring in March.[75] Kolkata has been hit by several cyclones; these include systems occurring in 1737 and 1864 that killed thousands.[76][77]
Environmental issues
Pollution is a major concern in Kolkata. As of 2008, sulphur dioxide and nitrogen dioxide annual concentration were within the national ambient air quality standards of India, but respirable suspended particulate matter levels were high, and on an increasing trend for five consecutive years, causing smog and haze.[80][81] Severe air pollution in the city has caused a rise in pollution-related respiratory ailments, such as lung cancer.[82]
Economy
Kolkata is the main commercial and financial hub of East and North-East India[61] and home to the Calcutta Stock Exchange.[83][84] It is a major commercial and military port, and is the only city in eastern India, apart from Bhubaneswar to have an international airport. Once India's leading city, Kolkata experienced a steady economic decline in the decades following India's independence due to steep population increases and a rise in militant trade-unionism, which included frequent strikes that were backed by left-wing parties.[52] From the 1960s to the late 1990s, several factories were closed and businesses relocated.[52] The lack of capital and resources added to the depressed state of the city's economy and gave rise to an unwelcome sobriquet: the "dying city".[85] The city's fortunes improved after the Indian economy was liberalised in the 1990s and changes in economic policy were enacted by the West Bengal state government.[52]
Flexible production has been the norm in Kolkata, which has an informal sector that employs more than 40% of the labour force.[16] One unorganised group, roadside hawkers, generated business worth ₹ 8,772 crore (US$ 2 billion) in 2005.[86] As of 2001, around 0.81% of the city's workforce was employed in the primary sector (agriculture, forestry, mining, etc.); 15.49% worked in the secondary sector (industrial and manufacturing); and 83.69% worked in the tertiary sector (service industries).[61]:19 As of 2003, the majority of households in slums were engaged in occupations belonging to the informal sector; 36.5% were involved in servicing the urban middle class (as maids, drivers, etc.), and 22.2% were casual labourers.[87]:11 About 34% of the available labour force in Kolkata slums were unemployed.[87]:11 According to one estimate, almost a quarter of the population live on less than 27 rupees (equivalent to 45 US cents) per day.[88] As of 2010, Kolkata, with an estimated gross domestic product (GDP) by purchasing power parity of 150 billion dollars, ranked third among South Asian cities, after Mumbai and Delhi.[89] Kolkata's GDP in 2014 was Rs 1.84 trillion, according to a collaborative assessment by multiple universities and climate agencies.[90] As in many other Indian cities, information technology became a high-growth sector in Kolkata starting in the late 1990s; the city's IT sector grew at 70% per annum—a rate that was twice the national average.[52] The 2000s saw a surge of investments in the real estate, infrastructure, retail, and hospitality sectors; several large shopping malls and hotels were launched.[91][92][93][94][95] Companies such as ITC Limited, CESC Limited, Exide Industries, Emami, Eveready Industries India, Lux Industries, Rupa Company, Berger Paints, Birla Corporation and Britannia Industries are headquartered in the city. Philips India, PricewaterhouseCoopers India, Tata Global Beverages, Tata Steel have their registered office and zonal headquarters in Kolkata. Kolkata hosts the headquarters of three major public-sector banks: Allahabad Bank, UCO Bank, and the United Bank of India; and a private bank Bandhan Bank. Reserve Bank of India has its eastern zonal office in Kolkata, and India Government Mint, Kolkata is one of the four mints in India.
Panoramic view of the Down town Sector V one of the major IT hubs of Kolkata as seen from the lakes surrounding Bidhannagar. Major Buildings such as Technopolis, Godrej Waterside, TCS Lords, Eden and Wanderers Park, Gobsyn Crystal, South City Pinnacle, RDB Boulevard, West Bengal Electronics Industry Development Corporation (WEBEL) Bhawan can be seen.
Demographics
See also: Ethnic communities in Kolkata
A skyline consisting of several high-rise buildings
Residential high-rise buildings in South City
A slum area of the city
The demonym for residents of Kolkata are Calcuttan and Kolkatan.[96][97] According to provisional results of the 2011 national census, Kolkata district, which occupies an area of 185 km2 (71 sq mi), had a population of 4,486,679;[98] its population density was 24,252/km2 (62,810/sq mi).[98] This represents a decline of 1.88% during the decade 2001–11. The sex ratio is 899 females per 1000 males—lower than the national average.[99] The ratio is depressed by the influx of working males from surrounding rural areas, from the rest of West Bengal; these men commonly leave their families behind.[100] Kolkata's literacy rate of 87.14%[99] exceeds the national average of 74%.[101] The final population totals of census 2011 stated the population of city as 4,496,694.[8] The urban agglomeration had a population of 14,112,536 in 2011.[9]
Bengali Hindus form the majority of Kolkata's population; Marwaris, Biharis and Muslims compose large minorities.[102] Among Kolkata's smaller communities are Chinese, Tamils, Nepalis, Odias, Telugus, Assamese, Gujaratis, Anglo-Indians, Armenians, Greeks, Tibetans, Maharashtrians, Konkanis, Malayalees, Punjabis, and Parsis.[26]:3 The number of Armenians, Greeks, Jews, and other foreign-origin groups declined during the 20th century.[103] The Jewish population of Kolkata was 5,000 during World War II, but declined after Indian independence and the establishment of Israel;[104] by 2013, there were 25 Jews in the city.[105] India's sole Chinatown is in eastern Kolkata;[103] once home to 20,000 ethnic Chinese, its population dropped to around 2,000 as of 2009[103] as a result of multiple factors including repatriation and denial of Indian citizenship following the 1962 Sino-Indian War, and immigration to foreign countries for better economic opportunities.[106] The Chinese community traditionally worked in the local tanning industry and ran Chinese restaurants.[103][107]
Kolkata urban agglomeration population growth Census Total %±
1981 9,194,000 —
1991 11,021,900 19.9%
2001 13,114,700 19.0%
2011 14,112,536 7.6%
Source: Census of India[9]
Others include Sikhism, Buddhism & Other religions (0.03%)
Religion in Kolkata[108]
Religion Percent
Hinduism
76.51%
Islam
20.60%
Christianity
0.88%
Jainism
0.47%
Others
1.54%
Bengali, the official state language, is the dominant language in Kolkata.[109] English is also used, particularly by the white-collar workforce. Hindi and Urdu are spoken by a sizeable minority.[110][111] According to the 2011 census, 76.51% of the population is Hindu, 20.60% Muslim, 0.88% Christian, and 0.47% Jain.[112] The remainder of the population includes Sikhs, Buddhists, and other religions which accounts for 0.45% of the population; 1.09% did not state a religion in the census.[112] Kolkata reported 67.6% of Special and Local Laws crimes registered in 35 large Indian cities during 2004.[113] The Kolkata police district registered 15,510 Indian Penal Code cases in 2010, the 8th-highest total in the country.[114] In 2010, the crime rate was 117.3 per 100,000, below the national rate of 187.6; it was the lowest rate among India's largest cities.[115]
As of 2003, about one-third of the population, or 1.5 million people, lived in 3,500 unregistered squatter-occupied and 2,011 registered slums.[87]:4[116]:92 The authorised slums (with access to basic services like water, latrines, trash removal by the Kolkata Municipal Corporation) can be broadly divided into two groups—bustees, in which slum dwellers have some long term tenancy agreement with the landowners; and udbastu colonies, settlements which had been leased to refugees from present-day Bangladesh by the Government.[116][87]:5 The unauthorised slums (devoid of basic services provided by the municipality) are occupied by squatters who started living on encroached lands—mainly along canals, railway lines and roads.[116]:92[87]:5 According to the 2005 National Family Health Survey, around 14% of the households in Kolkata were poor, while 33% lived in slums, indicating a substantial proportion of households in slum areas were better off economically than the bottom quarter of urban households in terms of wealth status.[117]:23 Mother Teresa was awarded the Nobel Peace Prize for founding and working with the Missionaries of Charity in Kolkata—an organisation "whose primary task was to love and care for those persons nobody was prepared to look after".[118]
Government and public services
Civic administration
Main article: Civic administration of Kolkata
A red-and-yellow building with multiple arches and towers standing against a backdrop of blue sky and framed by trees
Calcutta High Court
Kolkata is administered by several government agencies. The Kolkata Municipal Corporation, or KMC, oversees and manages the civic infrastructure of the city's 15 boroughs, which together encompass 141 wards.[109] Each ward elects a councillor to the KMC. Each borough has a committee of councillors, each of whom is elected to represent a ward. By means of the borough committees, the corporation undertakes urban planning and maintains roads, government-aided schools, hospitals, and municipal markets.[119] As Kolkata's apex body, the corporation discharges its functions through the mayor-in-council, which comprises a mayor, a deputy mayor, and ten other elected members of the KMC.[120] The functions of the KMC include water supply, drainage and sewerage, sanitation, solid waste management, street lighting, and building regulation.[119]
The Kolkata Municipal Corporation was ranked 1st out of 21 Cities for best governance & administrative practices in India in 2014. It scored 4.0 on 10 compared to the national average of 3.3.[121]
The Kolkata Port Trust, an agency of the central government, manages the city's river port. As of 2012, the All India Trinamool Congress controls the KMC; the mayor is Firhad Hakim, while the deputy mayor is Atin Ghosh.[122] The city has an apolitical titular post, that of the Sheriff of Kolkata, which presides over various city-related functions and conferences.[123]
Kolkata's administrative agencies have areas of jurisdiction that do not coincide. Listed in ascending order by area, they are: Kolkata district; the Kolkata Police area and the Kolkata Municipal Corporation area, or "Kolkata city";[124] and the Kolkata metropolitan area, which is the city's urban agglomeration. The agency overseeing the latter, the Kolkata Metropolitan Development Authority, is responsible for the statutory planning and development of greater Kolkata.[125]
As the seat of the Government of West Bengal, Kolkata is home to not only the offices of the local governing agencies, but also the West Bengal Legislative Assembly; the state secretariat, which is housed in the Writers' Building; and the Calcutta High Court. Most government establishments and institutions are housed in the centre of the city in B. B. D. Bagh (formerly known as Dalhousie Square). The Calcutta High Court is the oldest High Court in India. It was preceded by the Supreme Court of Judicature at Fort William which was established in 1774. The Calcutta High Court has jurisdiction over the state of West Bengal and the Union Territory of the Andaman and Nicobar Islands. Kolkata has lower courts: the Court of Small Causes and the City Civil Court decide civil matters; the Sessions Court rules in criminal cases.[126][127][128] The Kolkata Police, headed by a police commissioner, is overseen by the West Bengal Ministry of Home Affairs.[129][130] The Kolkata district elects two representatives to India's lower house, the Lok Sabha, and 11 representatives to the state legislative assembly.[131]
Utility services
A telecommunications tower belonging to services provider Tata Communications
The Kolkata Municipal Corporation supplies the city with potable water that is sourced from the Hooghly River;[132] most of it is treated and purified at the Palta pumping station located in North 24 Parganas district.[133] Roughly 95% of the 4,000 tonnes of refuse produced daily by the city is transported to the dumping grounds in Dhapa, which is east of the town.[134][135] To promote the recycling of garbage and sewer water, agriculture is encouraged on the dumping grounds.[136] Parts of the city lack proper sewerage, leading to unsanitary methods of waste disposal.[75]
Electricity is supplied by the privately operated Calcutta Electric Supply Corporation, or CESC, to the city proper; the West Bengal State Electricity Board supplies it in the suburbs.[137][138] Fire services are handled by the West Bengal Fire Service, a state agency.[139] As of 2012, the city had 16 fire stations.[140]
State-owned Bharat Sanchar Nigam Limited, or BSNL, as well as private enterprises, among them Vodafone, Bharti Airtel, Reliance, Idea Cellular, Aircel, Tata DoCoMo, Tata Teleservices, Virgin Mobile, and MTS India, are the leading telephone and cell phone service providers in the city.[141]:25–26:179 with Kolkata being the first city in India to have cell phone and 4G connectivity, the GSM and CDMA cellular coverage is extensive.[142][143] As of 2010, Kolkata has 7 percent of the total Broadband internet consumers in India; BSNL, VSNL, Tata Indicom, Sify, Airtel, and Reliance are among the main vendors.[144][145]
Military and diplomatic establishments
The Eastern Command of the Indian Army is based in the city. Being one of India's major city and the largest city in eastern and north-eastern India, Kolkata hosts diplomatic missions of many countries such as Australia, Bangladesh, Bhutan, Canada, People's Republic of China, France, Germany, Italy, Japan, Myanmar, Nepal, Russia, Srilanka, Switzerland, Thailand, United Kingdom and United States. The U.S Consulate in Kolkata is the US Department of State's second oldest Consulate and dates from 19 November 1792.[146]
Transport
Public transport is provided by the Kolkata Suburban Railway, the Kolkata Metro, trams, rickshaws, and buses. The suburban rail network reaches the city's distant suburbs.
According to a 2013 survey conducted by the International Association of Public Transport, in terms of a public transport system, Kolkata ranks among the top of the six Indian cities surveyed.[147][148] The Kolkata Metro, in operation since 1984, is the oldest underground mass transit system in India.[149] It spans the north–south length of the city and covers a distance of 25.1 km (16 mi).[150] As of 2009, five Metro rail lines were under construction.[151] Kolkata has four long-distance railway stations, located at Howrah (the largest railway complex in India), Sealdah, Chitpur and Shalimar, which connect Kolkata by rail to most cities in West Bengal and to other major cities in India.[152] The city serves as the headquarters of three railway Zone out of Seventeen of the Indian Railways regional divisions—the Kolkata Metro Railways, Eastern Railway and the South-Eastern Railway.[153] Kolkata has rail and road connectivity with Dhaka, the capital of Bangladesh.[154][155][156]
Buses, which are the most commonly used mode of transport, are run by government agencies and private operators.[157] Kolkata is the only Indian city with a tram network, which is operated by the Calcutta Tramways Company.[158] The slow-moving tram services are restricted to certain areas of the city. Water-logging, caused by heavy rains that fall during the summer monsoon, can interrupt transportation networks.[159][160] Hired public conveyances include auto rickshaws, which often ply specific routes, and yellow metered taxis. Almost all of Kolkata's taxis are antiquated Hindustan Ambassadors by make; newer air-conditioned radio taxis are in service as well.[161][162] In parts of the city, cycle rickshaws and hand-pulled rickshaws are patronised by the public for short trips.[163]
Due to its diverse and abundant public transportation, privately owned vehicles are not as common in Kolkata as in other major Indian cities.[164] The city has witnessed a steady increase in the number of registered vehicles; 2002 data showed an increase of 44% over a period of seven years.[165] As of 2004, after adjusting for population density, the city's "road space" was only 6% compared to 23% in Delhi and 17% in Mumbai.[166] The Kolkata Metro has somewhat eased traffic congestion, as has the addition of new roads and flyovers. Agencies operating long-distance bus services include the Calcutta State Transport Corporation, the South Bengal State Transport Corporation, the North Bengal State Transport Corporation, and various private operators. The city's main bus terminals are located at Esplanade and Babughat.[167] The Kolkata–Delhi and Kolkata–Chennai prongs of the Golden Quadrilateral, and National Highway 34 start from the city.[168]
Netaji Subhas Chandra Bose International Airport, located in Dum Dum some 16 km (9.9 mi) north-east of the city centre, operates domestic and international flights. In 2013, the airport was upgraded to handle increased air traffic.[169][170]
The Port of Kolkata, established in 1870, is India's oldest and the only major river port.[171] The Kolkata Port Trust manages docks in Kolkata and Haldia.[172] The port hosts passenger services to Port Blair, capital of the Andaman and Nicobar Islands; freighter service to ports throughout India and around the world is operated by the Shipping Corporation of India.[171][173] Ferry services connect Kolkata with its twin city of Howrah, located across the Hooghly River.[174][175]
The route from North Bengal to Kolkata is set to become cheaper and more efficient for people travelling by bus. Through April 2017 to March 2018, the North Bengal State Transport Corporation (NBSTC) will be introducing a fleet of rocket buses equipped with bio-toilets for the bus route.[176]
Healthcare
See also: Health care in Kolkata
A big building in cream colour with many columns and a portico
Calcutta Medical College, the second institution in Asia to teach modern medicine(after 'Ecole de Médicine de Pondichéry')
IPGMER and SSKM Hospital, Kolkata is the largest hospital in West Bengal and one of the oldest in Kolkata.
As of 2011, the health care system in Kolkata consists of 48 government hospitals, mostly under the Department of Health & Family Welfare, Government of West Bengal, and 366 private medical establishments;[177] these establishments provide the city with 27,687 hospital beds.[177] For every 10,000 people in the city, there are 61.7 hospital beds,[178] which is higher than the national average of 9 hospital beds per 10,000.[179] Ten medical and dental colleges are located in the Kolkata metropolitan area which act as tertiary referral hospitals in the state.[180][181] The Calcutta Medical College, founded in 1835, was the first institution in Asia to teach modern medicine.[182] However, These facilities are inadequate to meet the healthcare needs of the city.[183][184][185] More than 78% in Kolkata prefer the private medical sector over the public medical sector,[117]:109 due to the poor quality of care, the lack of a nearby facility, and excessive waiting times at government facilities.[117]:61
According to the Indian 2005 National Family Health Survey, only a small proportion of Kolkata households were covered under any health scheme or health insurance.[117]:41 The total fertility rate in Kolkata was 1.4, The lowest among the eight cities surveyed.[117]:45 In Kolkata, 77% of the married women used contraceptives, which was the highest among the cities surveyed, but use of modern contraceptive methods was the lowest (46%).[117]:47 The infant mortality rate in Kolkata was 41 per 1,000 live births, and the mortality rate for children under five was 49 per 1,000 live births.[117]:48
Among the surveyed cities, Kolkata stood second (5%) for children who had not had any vaccinations under the Universal Immunization Programme as of 2005.[117]:48 Kolkata ranked second with access to an anganwadi centre under the Integrated Child Development Services (ICDS) programme for 57% of the children between 0 and 71 months.[117]:51 The proportion of malnourished, anaemic and underweight children in Kolkata was less in comparison to other surveyed cities.[117]:54–55
About 18% of the men and 30% of the women in Kolkata are obese—the majority of them belonging to the non-poor strata of society.[117]:105 In 2005, Kolkata had the highest percentage (55%) among the surveyed cities of anaemic women, while 20% of the men in Kolkata were anaemic.[117]:56–57 Diseases like diabetes, asthma, goitre and other thyroid disorders were found in large numbers of people.[117]:57–59 Tropical diseases like malaria, dengue and chikungunya are prevalent in Kolkata, though their incidence is decreasing.[186][187] Kolkata is one of the districts in India with a high number of people with AIDS; it has been designated a district prone to high risk.[188][189]
As of 2014, because of higher air pollution, the life expectancy of a person born in the city is four years fewer than in the suburbs.[190]
Education
Kolkata's schools are run by the state government or private organisations, many of which are religious. Bengali and English are the primary languages of instruction; Urdu and Hindi are also used, particularly in central Kolkata.[191][192] Schools in Kolkata follow the "10+2+3" plan. After completing their secondary education, students typically enroll in schools that have a higher secondary facility and are affiliated with the West Bengal Council of Higher Secondary Education, the ICSE, or the CBSE.[191] They usually choose a focus on liberal arts, business, or science. Vocational programs are also available.[191] Some Kolkata schools, for example La Martiniere Calcutta, Calcutta Boys' School, St. James' School (Kolkata), St. Xavier's Collegiate School, and Loreto House, have been ranked amongst the best schools in the country.[193]
Indian Institute of Foreign Trade
As of 2010, the Kolkata urban agglomeration is home to 14 universities run by the state government.[194] The colleges are each affiliated with a university or institution based either in Kolkata or elsewhere in India. Aliah University which was founded in 1780 as Mohammedan College of Calcutta is the oldest post-secondary educational institution of the city.[195] The University of Calcutta, founded in 1857, is the first modern university in South Asia.[196] Presidency College, Kolkata (formerly Hindu College between 1817 and 1855), founded in 1855, was one of the oldest and most eminent colleges in India. It was affiliated with the University of Calcutta until 2010 when it was converted to Presidency University, Kolkata in 2010. Bengal Engineering and Science University (BESU) is the second oldest engineering institution of the country located in Howrah.[197] An Institute of National Importance, BESU was converted to India's first IIEST. Jadavpur University is known for its arts, science, and engineering faculties.[198] The Indian Institute of Management Calcutta, which was the first of the Indian Institutes of Management, was established in 1961 at Joka, a locality in the south-western suburbs. Kolkata also houses the prestigious Indian Institute of Foreign Trade, which was started here in the year 2006.[199] The West Bengal National University of Juridical Sciences is one of India's autonomous law schools,[200][201] and the Indian Statistical Institute is a public research institute and university. State owned Maulana Abul Kalam Azad University of Technology, West Bengal (MAKAUT, WB), formerly West Bengal University of Technology (WBUT) is the largest Technological University in terms of student enrollment and number of Institutions affiliated by it. Private institutions include the Ramakrishna Mission Vivekananda Educational and Research Institute and University of Engineering & Management (UEM).
Notable scholars who were born, worked or studied in Kolkata include physicists Satyendra Nath Bose, Meghnad Saha,[202] and Jagadish Chandra Bose;[203] chemist Prafulla Chandra Roy;[202] statisticians Prasanta Chandra Mahalanobis and Anil Kumar Gain;[202] physician Upendranath Brahmachari;[202] educator Ashutosh Mukherjee;[204] and Nobel laureates Rabindranath Tagore,[205] C. V. Raman,[203] and Amartya Sen.[206]
Kolkata houses many premier research institutes like Indian Association for the Cultivation of Science (IACS), Indian Institute of Chemical Biology (IICB), Indian Institute of Science Education and Research (IISER), Bose Institute, Saha Institute of Nuclear Physics (SINP), All India Institute of Hygiene and Public Health, Central Glass and Ceramic Research Institute (CGCRI), S.N. Bose National Centre for Basic Sciences (SNBNCBS), Indian Institute of Social Welfare and Business Management (IISWBM), National Institute of Pharmaceutical Education and Research, Kolkata, Variable Energy Cyclotron Centre (VECC) and Indian Centre for Space Physics. Nobel laureate Sir C. V. Raman did his groundbreaking work in Raman effect in IACS.
Culture
Kolkata is known for its literary, artistic, and revolutionary heritage; as the former capital of India, it was the birthplace of modern Indian literary and artistic thought.[207] Kolkata has been called the "City of Furious, Creative Energy"[208] as well as the "cultural [or literary] capital of India".[209][210] The presence of paras, which are neighbourhoods that possess a strong sense of community, is characteristic of the city.[211] Typically, each para has its own community club and, on occasion, a playing field.[211] Residents engage in addas, or leisurely chats, that often take the form of freestyle intellectual conversation.[212][213] The city has a tradition of political graffiti depicting everything from outrageous slander to witty banter and limericks, caricatures, and propaganda.[214][215]
Kolkata has many buildings adorned with Indo-Islamic and Indo-Saracenic architectural motifs. Several well-maintained major buildings from the colonial period have been declared "heritage structures";[216] others are in various stages of decay.[217][218] Established in 1814 as the nation's oldest museum, the Indian Museum houses large collections that showcase Indian natural history and Indian art.[219] Marble Palace is a classic example of a European mansion that was built in the city. The Victoria Memorial, a place of interest in Kolkata, has a museum documenting the city's history. The National Library of India is the leading public library in the country while Science City is the largest science centre in the Indian subcontinent.[220]
The popularity of commercial theatres in the city has declined since the 1980s.[221]:99[222] Group theatres of Kolkata, a cultural movement that started in the 1940s contrasting with the then-popular commercial theatres, are theatres that are not professional or commercial, and are centres of various experiments in theme, content, and production;[223] group theatres use the proscenium stage to highlight socially relevant messages.[221]:99[224] Chitpur locality of the city houses multiple production companies of jatra, a tradition of folk drama popular in rural Bengal.[225][226] Kolkata is the home of the Bengali cinema industry, dubbed "Tollywood" for Tollygunj, where most of the state's film studios are located.[227] Its long tradition of art films includes globally acclaimed film directors such as Academy Award-winning director Satyajit Ray, Ritwik Ghatak, Mrinal Sen, Tapan Sinha, and contemporary directors such as Aparna Sen, Buddhadeb Dasgupta, Goutam Ghose and Rituparno Ghosh.[228]
During the 19th and 20th centuries, Bengali literature was modernised through the works of authors such as Ishwar Chandra Vidyasagar, Bankim Chandra Chattopadhyay, Michael Madhusudan Dutt, Rabindranath Tagore, Kazi Nazrul Islam, and Sarat Chandra Chattopadhyay.[229] Coupled with social reforms led by Ram Mohan Roy, Swami Vivekananda, and others, this constituted a major part of the Bengal Renaissance.[230] The middle and latter parts of the 20th century witnessed the arrival of post-modernism, as well as literary movements such as those espoused by the Kallol movement, hungryalists and the little magazines.[231] Large majority of publishers of the city is concentrated in and around College Street, "... a half-mile of bookshops and bookstalls spilling over onto the pavement", selling new and used books.[232]
Kalighat painting originated in 19th century Kolkata as a local style that reflected a variety of themes including mythology and quotidian life.[233] The Government College of Art and Craft, founded in 1864, has been the cradle as well as workplace of eminent artists including Abanindranath Tagore, Jamini Roy, and Nandalal Bose.[234] The art college was the birthplace of the Bengal school of art that arose as an avant garde and nationalist movement reacting against the prevalent academic art styles in the early 20th century.[235][236] The Academy of Fine Arts and other art galleries hold regular art exhibitions. The city is recognised for its appreciation of Rabindra sangeet (songs written by Rabindranath Tagore) and Indian classical music, with important concerts and recitals, such as Dover Lane Music Conference, being held throughout the year; Bengali popular music, including baul folk ballads, kirtans, and Gajan festival music; and modern music, including Bengali-language adhunik songs.[237][238] Since the early 1990s, new genres have emerged, including one comprising alternative folk–rock Bengali bands.[237] Another new style, jibonmukhi gaan ("songs about life"), is based on realism.[221]:105 Key elements of Kolkata's cuisine include rice and a fish curry known as machher jhol,[239] which can be accompanied by desserts such as roshogolla, sandesh, and a sweet yoghurt known as mishti dohi. Bengal's large repertoire of seafood dishes includes various preparations of ilish, a fish that is a favourite among Calcuttans. Street foods such as beguni (fried battered eggplant slices), kati roll (flatbread roll with vegetable or chicken, mutton, or egg stuffing), phuchka (a deep-fried crêpe with tamarind sauce) and Indian Chinese cuisine from Chinatown are popular.[240][241][242][243]
Though Bengali women traditionally wear the sari, the shalwar kameez and Western attire is gaining acceptance among younger women.[244] Western-style dress has greater acceptance among men, although the traditional dhoti and kurta are seen during festivals. Durga Puja, held in September–October, is Kolkata's most important and largest festival; it is an occasion for glamorous celebrations and artistic decorations.[245][246] The Bengali New Year, known as Poila Boishak, as well as the harvest festival of Poush Parbon are among the city's other festivals; also celebrated are Kali Puja, Diwali, Holi, Jagaddhatri Puja, Saraswati Puja, Rathayatra, Janmashtami, Maha Shivratri, Vishwakarma Puja, Lakshmi Puja, Ganesh Chathurthi, Makar Sankranti, Gajan, Kalpataru Day, Bhai Phonta, Maghotsab, Eid, Muharram, Christmas, Buddha Purnima and Mahavir Jayanti. Cultural events include the Rabindra Jayanti, Independence Day(15 August), Republic Day(26 January), Kolkata Book Fair, the Dover Lane Music Festival, the Kolkata Film Festival, Nandikar's National Theatre Festival, Statesman Vintage & Classic Car Rally and Gandhi Jayanti.
Media
See also: Kolkata in the media and List of Bengali-language television channels
A five storied building in cream colour with multiple columns in front
Akashvani Bhawan, the head office of state-owned All India Radio, Kolkata
The first newspaper in India, the Bengal Gazette started publishing from the city in 1780.[247] Among Kolkata's widely circulated Bengali-language newspapers are Anandabazar Patrika, Bartaman, Sangbad Pratidin, Aajkaal, Dainik Statesman and Ganashakti.[248] The Statesman and The Telegraph are two major English-language newspapers that are produced and published from Kolkata. Other popular English-language newspapers published and sold in Kolkata include The Times of India, Hindustan Times, The Hindu, The Indian Express, and the Asian Age.[248] As the largest trading centre in East India, Kolkata has several high-circulation financial dailies, including The Economic Times, The Financial Express, Business Line, and Business Standard.[248][249] Vernacular newspapers, such as those in the Hindi, Urdu, Gujarati, Odia, Punjabi, and Chinese languages, are read by minorities.[248][103] Major periodicals based in Kolkata include Desh, Sananda, Saptahik Bartaman, Unish-Kuri, Anandalok, and Anandamela.[248] Historically, Kolkata has been the centre of the Bengali little magazine movement.[250][251]
All India Radio, the national state-owned radio broadcaster, airs several AM radio stations in the city.[252] Kolkata has 12 local radio stations broadcasting on FM, including two from AIR.[253] India's state-owned television broadcaster, Doordarshan, provides two free-to-air terrestrial channels,[254] while a mix of Bengali, Hindi, English, and other regional channels are accessible via cable subscription, direct-broadcast satellite services, or internet-based television.[255][256][257] Bengali-language 24-hour television news channels include ABP Ananda, Tara Newz, Kolkata TV, 24 Ghanta, News Time and Channel 10.[258]
Sports
See also: Football in Kolkata, Kolkata Marathon, and Kolkata derby
Salt Lake Stadium during Indian Super League opening ceremony
The most popular sports in Kolkata are football and cricket. Unlike most parts of India, the residents show significant passion for football.[259] The city is home to top national football clubs such as Mohun Bagan A.C., East Bengal F.C., Prayag United S.C., and the Mohammedan Sporting Club.[260][261] Calcutta Football League, which was started in 1898, is the oldest football league in Asia.[262] Mohun Bagan A.C., one of the oldest football clubs in Asia, is the only organisation to be dubbed a "National Club of India".[263][264] Football matches between Mohun Bagan and East Bengal, dubbed as the Kolkata derby, witness large audience attendance and rivalry between patrons.[265]
A Twenty20 cricket match between Kolkata Knight Riders and Pune Warriors during Indian Premier League at the Eden Gardens
As in the rest of India, cricket is popular in Kolkata and is played on grounds and in streets throughout the city.[266][267] Kolkata has the Indian Premier League franchise Kolkata Knight Riders; the Cricket Association of Bengal, which regulates cricket in West Bengal, is also based in the city. Kolkata also has an Indian Super League franchise known as Atlético de Kolkata. Tournaments, especially those involving cricket, football, badminton, and carrom, are regularly organised on an inter-locality or inter-club basis.[211] The Maidan, a vast field that serves as the city's largest park, hosts several minor football and cricket clubs and coaching institutes.[268]
Eden Gardens, which has a capacity of 68,000 as of 2017,[269] hosted the final match of the 1987 Cricket World Cup. It is home to the Bengal cricket team and the Kolkata Knight Riders.
The multi-use Salt Lake Stadium, also known as Yuva Bharati Krirangan, is India's largest stadium by seating capacity. Most matches of the 2017 FIFA U-17 World Cup were played in the Salt Lake Stadium including both Semi-Final matches and the Final match. Kolkata also accounted for 45% of total attendance in 2017 FIFA U-17 World Cup with an average of 55,345 spectators.[270] The Calcutta Cricket and Football Club is the second-oldest cricket club in the world.[271][272]
Kolkata's Netaji Indoor Stadium served as host of the 1981 Asian Basketball Championship, where India's national basketball team finished 5th, ahead of teams that belong to Asia's basketball elite, such as Iran. The city has three 18-hole golf courses. The oldest is at the Royal Calcutta Golf Club, the first golf club built outside the United Kingdom.[273][274] The other two are located at the Tollygunge Club and at Fort William. The Royal Calcutta Turf Club hosts horse racing and polo matches.[275] The Calcutta Polo Club is considered the oldest extant polo club in the world.[276][277][278] The Calcutta Racket Club is a squash and racquet club in Kolkata. It was founded in 1793, making it one of the oldest rackets clubs in the world, and the first in the Indian subcontinent.[279][280] The Calcutta South Club is a venue for national and international tennis tournaments; it held the first grass-court national championship in 1946.[281][282] In the period 2005–2007, Sunfeast Open, a tier-III tournament on the Women's Tennis Association circuit, was held in the Netaji Indoor Stadium; it has since been discontinued.[283][284]
The Calcutta Rowing Club hosts rowing heats and training events. Kolkata, considered the leading centre of rugby union in India, gives its name to the oldest international tournament in rugby union, the Calcutta Cup.[285][286][287] The Automobile Association of Eastern India, established in 1904,[288][289] and the Bengal Motor Sports Club are involved in promoting motor sports and car rallies in Kolkata and West Bengal.[290][291] The Beighton Cup, an event organised by the Bengal Hockey Association and first played in 1895, is India's oldest field hockey tournament; it is usually held on the Mohun Bagan Ground of the Maidan.[292][293] Athletes from Kolkata include Sourav Ganguly and Pankaj Roy, who are former captains of the Indian national cricket team; Olympic tennis bronze medallist Leander Paes, golfer Arjun Atwal, and former footballers Sailen Manna, Chuni Goswami, P. K. Banerjee, and Subrata Bhattacharya.
An abstract shot from the new Mathematics gallery at the science room, designed by the late, great architect Zaha Hadid, which is modelled on a wind tunnel for a 1920s plane.
Thought this looked like a macro shot of an ant's head!
IMG_1964
The bridge was designed in 1748 by William Etheridge (1709–76), and was built in 1749 by James Essex the Younger (1722–84). It has subsequently been repaired in 1866 and rebuilt to the same design in 1905.
The Mathematical Bridge (The Wooden Bridge)
I was once told that this bridge was built by Newton without Nuts and Bolts, but Newton died in 1727 a couple of decades before it was built. This is a well known myth.
In fact the bridge was designed by William Etheridge, and built by James Essex in 1749. It has been rebuilt on two occasions, in 1866 and in 1905, but has kept the same overall design.
The Bridges of Koningsburg. The 3rd of 25 mathematic Lego mini mosaics (20 inches square). When completed the entire montage will stretch over 42 feet.
There is something weird going on with beauty in the natural world we live in.
1. Our eye sees something like the head of a bee. Due to colour, texture, shape etc our mind registers this as beauty.
2. Here we have a piece of a little membrane of a seed pod. There is still some texture, some colour but if we would zoom in more, beauty would become less, until a few lines are left.
3. Here we see matter at atomic level, at least we can imagine it is :;) . Visual beauty disappears and a strange world of probabilities seems to exist over there.
4. However, mathematical beauty (4), arising in a human mind, seems to describe the behaviour of reality at this level where visible beauty has disappeared.
So we found the cycle starting with visible beauty entering our mind and ending with invisible beauty emanating from our mind corresponding to an invisble reality.
Just a pity that this mathematical beauty is so complex.......
EXIF is from photo 1
Lisbon oceanarium stairs. A place designed to be enjoyed from all angles from the moment you enter it.
A couple of different exposures of the Mathematical Bridge at Queens' college. Contrary to punt guide tales, it has nothing to do with Isaac Newton.
I can't decide which I prefer
Sunday evening sunset ~ 16.35 p.m. - on Monday ~10 a.m. on Explore
Highest position: #291 on Monday, November 23, 2009
Camera: Canon PowerShot SX1 IS
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____|__click : Large_View__ © __B l a c k M a g i c__|___
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Exposure: sec (1/250)
Aperture: f/5.7
Focal Length: 100 mm 20x zoom ~ 560mm analog
Scene Capture Type: Landscape
Categories: Scenery
Easy Mode: Sunset
ISO Speed: 80
fixed stand
define: sunset, Sonnenuntergang
Das scheinbare Abtauchen der Sonne unter den Horizont.
Wegen des Sonnendurchmessers, der im Winkelmaß 0,52 bis 0,54° beträgt, dauert der Sonnenuntergang von der ersten Horizontberührung bis zum Versinken in Mitteleuropa 3-4 Minuten.
Am Äquator verkürzt sich der Vorgang wegen der steileren Sonnenbahn auf 2,1 Minuten.
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Je nach Wetterlage kann das Sinken der Sonne mit einem beeindruckenden Farbenspiel verbunden sein, das manchmal nicht nur im Abendrot erstrahlt, sondern auch gelbe, violette oder gar grüne Farbtöne aufweist.
Die Farbveränderung wird durch die Streuung des Lichts verursacht. Die Erdatmosphäre wirkt hierbei mit ihren schwebenden Partikeln (Aerosole in der Peplosphäre) als diffus streuendes Medium, wobei blaues Licht stets stärker gestreut wird, als rotes (Diese Tatsache ist auch für das Himmelsblau verantwortlich).
Der blaue Lichtanteil aus der sinkenden Sonnenscheibe wird also stärker gestreut, so dass mehr rotes Licht den Beobachter erreicht.
Zusätzlich kann bei bestimmten Temperatur-Schichtungen auch ein ganz geringer Prismen-Effekt durch die Atmosphäre auftreten, der sich bei extrem scharfen Horizont als sogenannter „Grüner Blitz“ zeigen kann: Der Rot-Anteil der Sonnenscheibe verschwindet zuerst unter dem Horizont, so dass am oberen Sonnenrand kurz ein grün-blauer Saum aufzublitzen scheint.
- .en Colors ?
The intense red and orange hues of the sky at sunrise and sunset are mainly caused by scattering of sunlight by dust particles, soot particles, other solid aerosols, and liquid aerosols in the Earth's atmosphere.
These enhanced red and orange colors at sunrise and sunset are mathematically explained by the Mie theory or the discrete dipole approximation. When there are no particulates in the troposphere, such as after a big rain storm, then the remaining less intense reds are explained by Rayleigh Scattering of sunlight by air molecules.
Sunset colors are typically more brilliant and more intense than sunrise colors, since there are generally more particles and aerosols in the evening air than in the morning air. Nighttime air is usually cooler and less windy, which allows dust and soot particles to settle out of the atmosphere, reducing the amount of Mie Scattering at sunrise
source :
wiki
and
Wiskunde Sterrenkunde Werktuigkunde
Mural and ceiling in the front hall of the Rijksmuseum Amsterdam, by Georg Sturm, around 1900
Seminar on Differential Equations and Integration Theory, Institute of Mathematics, Czech Academy of Sciences
Walking back to Surfers along the beach front.
James Beattie, a farmer, became the first European to settle in the area when he staked out an 80-acre (32 ha) farm on the northern bank of the Nerang River, close to present-day Cavill Avenue. The farm proved unsuccessful and was sold in 1877 to German immigrant Johan Meyer, who turned the land into a sugar farm and mill. Meyer also had little luck growing in the sandy soil and within a decade had auctioned the farm and started a ferry service and built the Main Beach hotel. By 1889, Meyer's hotel had become a post receiving office and subdivisions surrounding it were named Elston, named by the Southport postmaster after his wife's home in Southport, Lancashire, England. The Main Beach Hotel licence lapsed after Meyer's death in 1901 and for 16 years Elston was a tourist town without a hotel or post office.
The boom of the 1950s and 1960s was centred on this area and the first of the tall apartment buildings were constructed in the decades that followed. Little remains of the early vegetation or natural features of the area and even the historical association of the beachfront development with the river is tenuous. The early subdivision pattern remains, although later reclamation of the islands in the Nerang River as housing estates, and the bridges to those islands, have created a contrast reflected in subdivision and building form. Some early remnants survived such as Budd's Beach — a low-scale open area on the river which even in the early history of the area was a centre for boating, fishing and swimming.
Some minor changes have occurred in extending the road along the beachfront since the early subdivision and The Esplanade road is now a focus of activity, with supporting shops and restaurants. The intensity of activity, centred on Cavill, Orchid and Elkhorn Avenues, is reflected in the density of development. Of all places on the Gold Coast the buildings in this area constitute a dominant and enduring image visible from as far south as Coolangatta and from the mountain resorts of the hinterland.
For more Info: en.wikipedia.org/wiki/Surfers_Paradise,_Queensland
The Postcard
A postally unused postcard that was published prior to 1995 by City Merchandise of 68, 34th. Street, Brooklyn, N.Y. The card has a divided back.
The photography was by Alan Schein.
On the back of the card is printed:
'Manhattan and Brooklyn
Bridges. New York.'
NYC - The World Trade Center 1973 - 2001
The original World Trade Center was a large complex of seven buildings in the Financial District of Lower Manhattan, New York City. It opened on April 4, 1973, and was destroyed in 2001 during the September 11 attacks.
At the time of their completion, the Twin Towers—the original 1 World Trade Center (the North Tower), at 1,368 feet (417 m); and 2 World Trade Center (the South Tower), at 1,362 feet (415.1 m)—were the tallest buildings in the world.
Other buildings in the complex included the Marriott World Trade Center (3 WTC), 4 WTC, 5 WTC, 6 WTC, and 7 WTC. The complex contained 13,400,000 square feet (1,240,000 m2) of office space. That's a lot of space - 308 acres.
The core complex was built between 1966 and 1975, at a cost of $400 million (equivalent to $2.27 billion in 2018).
During its existence, the World Trade Center experienced several major incidents, including a fire on the 13th. February 1975, a bombing on the 26th. February 1993, and a bank robbery on the 14th. January 1998.
In 1998, the Port Authority of New York and New Jersey decided to privatize it by leasing the buildings to a private company to manage. It awarded the lease to Silverstein Properties in July 2001.
The 9/11 Attacks
On the morning of the 11th. September 2001, Al-Qaeda-affiliated hijackers flew two Boeing 767 jets into the Twin Towers within minutes of each other; two hours later, both towers collapsed. The attacks killed 2,606 people in the towers and their vicinity, as well as all 157 on board the two aircraft.
Falling debris from the towers, combined with fires that the debris initiated in several surrounding buildings, led to the partial or complete collapse of all the buildings in the complex, and caused catastrophic damage to ten other large structures in the surrounding area.
Subsequent Developments
The clean-up and recovery process at the World Trade Center site took eight months, during which the remains of the other buildings were demolished.
A new World Trade Center complex is being built (2020) with six new skyscrapers and several other buildings, many of which are complete. A memorial and museum to those killed in the attacks, a new rapid transit hub, and an elevated park have been opened.
One World Trade Center, the tallest building in the Western Hemisphere at 1,776 feet (541 m) and the lead building for the new complex, was completed in May 2013, and opened in November 2014.
During its existence prior to 2001, the World Trade Center was an icon of New York City. It had a major role in popular culture, and according to one estimate was depicted in 472 films. Following the World Trade Center's destruction, mentions of the complex were altered or deleted, and several dozen "memorial films" were created.
For details of the earlier 1993 bomb attack on the WTC, please search for the tag 79CMP42
Economic Effects of the September 11 Attacks
The September 11 attacks in 2001 were followed by initial shocks causing global stock markets to drop sharply. The attacks themselves resulted in approximately $40 billion in insurance losses, making it one of the largest insured events ever.
-- Financial markets
On Tuesday, September 11, 2001, the opening of the New York Stock Exchange (NYSE) was delayed after the first plane crashed into the World Trade Center's North Tower, and trading for the day was canceled after the second plane crashed into the South Tower.
The NASDAQ also canceled trading. The New York Stock Exchange Building was then evacuated as well as nearly all banks and financial institutions on Wall Street and in many cities across the country.
The London Stock Exchange and other stock exchanges around the world were also closed down and evacuated in fear of follow-up terrorist attacks.
The New York Stock Exchange remained closed until the following Monday. This was only the third time in history that the NYSE experienced prolonged closure, the first time being during the early months of the Great War, and the second in March 1933 during the Great Depression.
Trading on the United States bond market also ceased; the leading government bond trader, Cantor Fitzgerald, was based in the World Trade Center. The New York Mercantile Exchange was also closed for a week after the attacks.
The Federal Reserve issued a statement, saying:
"We are open and operating. The
discount window is available to
meet liquidity needs."
The Federal Reserve added $100 billion in liquidity per day during the three days following the attack in order to help avert a financial crisis.
Gold prices spiked upwards, from $215.50 to $287 an ounce in London trading. Oil prices also spiked upwards. Gas prices in the United States also briefly shot up, though the spike in prices lasted only about one week.
Currency trading continued, with the United States dollar falling sharply against the Euro, British pound, and Japanese yen.
The next day, European stock markets fell sharply, including declines of 4.6% in Spain, 8.5% in Germany, and 5.7% on the London Stock Exchange.
Stocks in the Latin American markets also plunged, with a 9.2% drop in Brazil, 5.2% drop in Argentina, and 5.6% decline in Mexico, before trading was halted.
-- Effect on Economic Sectors
In international and domestic markets, stocks of companies in some sectors were hit particularly hard. Travel and entertainment stocks fell, while communications, pharmaceutical and military/defense stocks rose. Online travel agencies particularly suffered, as they cater to leisure travel.
-- Insurance Consequences of the Attacks
Insurance losses due to 9/11 were more than one and a half times greater than what was previously the largest disaster (Hurricane Andrew) in terms of losses.
The losses included business interruption ($11.0 billion), property ($9.6 billion), liability ($7.5 billion), workers compensation ($1.8 billion), and others ($2.5 billion).
The firms with the largest losses included Berkshire Hathaway, Lloyd's, Swiss Re, and Munich Re, all of which are reinsurers, with more than $2 billion in losses for each.
Shares of major reinsurers, including Swiss Re and Baloise Insurance Group dropped by more than 10%, while shares of Swiss Life dropped 7.8%.
Although the insurance industry held reserves that covered the 9/11 attacks, insurance companies were reluctant to continue providing coverage for future terrorist attacks. Only a few insurers continue to offer such coverage.
-- Consequences for Airlines and Aviation
Flights were grounded in various places across the United States and Canada that did not necessarily have operational support in place, such as dedicated ground crews.
A large number of transatlantic flights landed in Gander, Newfoundland and in Halifax, Nova Scotia, with the logistics handled by Transport Canada in Operation Yellow Ribbon.
In order to help with the immediate needs of victims' families, United Airlines and American Airlines both provided initial payments of $25,000. The airlines were also required to refund ticket purchases for anyone unable to fly.
The 9/11 attacks compounded financial troubles that the airline industry was already experiencing before the attacks. Share prices of airlines and airplane manufacturers plummeted after the attacks.
Midway Airlines, already on the brink of bankruptcy, shut down operations almost immediately afterward. Swissair, unable to make payments to creditors on its large debt was grounded on the 2nd. October 2001 and later liquidated.
Other airlines were threatened with bankruptcy, and tens of thousands of layoffs were announced in the week following the attacks. To help the industry, the federal government provided an aid package, including $10 billion in loan guarantees, along with $5 billion for short-term assistance.
The reduction in air travel demand caused by the attack is also seen as a contributory reason for the retirement of the only supersonic aircraft in service at the time, Concorde.
-- Effects of the Attacks on Tourism
Tourism in New York City plummeted, causing massive losses in a sector that employed 280,000 people and generated $25 billion per year.
In the week following the attack, hotel occupancy fell below 40%, and 3,000 employees were laid off.
Tourism, hotel occupancy, and air travel also fell drastically across the nation. The reluctance to fly may have been due to increased fear of a repeat attack. Suzanne Thompson, Professor of Psychology at Pomona College, conducted interviews with 501 people who were not direct victims of 9/11.
From this, she concluded that:
"Most participants felt more distress
(65%) and a stronger fear of flying
(55%) immediately after the event
than they did before the attacks."
-- Effects on Security
Since the 9/11 attacks, substantial resources have been put in place in the US towards improving security, in the areas of homeland security, national defense, and in the private sector.
-- Effects on New York City
In New York City, approximately 430,000 jobs were lost, and there were $2.8 billion in lost wages over the three months following the 9/11 attacks. The economic effects were mainly focused on the city's export economy sectors.
The GDP for New York City was estimated to have declined by $30.3 billion over the final three months of 2001 and all of 2002.
The Federal government provided $11.2 billion in immediate assistance to the Government of New York City in September 2001, and $10.5 billion in early 2002 for economic development and infrastructure needs.
The 9/11 attacks also had great impact on small businesses in Lower Manhattan, located near the World Trade Center. Approximately 18,000 small businesses were destroyed or displaced after the attacks.
The Small Business Administration provided loans as assistance, while Community Development Block Grants and Economic Injury Disaster Loans were used by the Federal Government to provide assistance to small business affected by the 9/11 attacks.
-- Other Effects of the Attacks
The September 11 attacks also led directly to the U.S. war in Afghanistan, as well as additional homeland security spending.
The attacks were also cited as a rationale for the Iraq war.
The cost of the two wars so far has surpassed $6 trillion.
More on 9/11 below.
Brooklyn Bridge
The Brooklyn Bridge (behind Manhattan Bridge in the photograph) is a hybrid cable-stayed/suspension bridge. Opened on the 24th. May 1883, the Brooklyn Bridge was the first fixed crossing of the East River.
It was also the longest suspension bridge in the world at the time of its opening, with a main span of 1,595.5 feet (486.3 m).
The bridge was designed by John A. Roebling. The project's chief engineer, his son Washington Roebling, contributed further design work, assisted by the latter's wife, Emily Warren Roebling.
Construction started in 1870, with the Tammany Hall-controlled New York Bridge Company overseeing construction, although numerous controversies and the novelty of the design prolonged the project over thirteen years.
Since opening, the Brooklyn Bridge has undergone several reconfigurations, having carried horse-drawn vehicles and elevated railway lines until 1950.
To alleviate increasing traffic flows, additional bridges and tunnels were built across the East River.
The Brooklyn Bridge is the southernmost of the four toll-free vehicular bridges connecting Manhattan Island and Long Island, with the Manhattan Bridge, the Williamsburg Bridge, and the Queensboro Bridge to the north. Only passenger vehicles and pedestrian and bicycle traffic are permitted.
A major tourist attraction since its opening, the Brooklyn Bridge has become an icon of New York City. Over the years, the bridge has been used as the location for various stunts and performances, as well as several crimes and attacks.
Following gradual deterioration, the Brooklyn Bridge has been renovated several times, including in the 1950's, 1980's, and 2010's.
Description of Brooklyn Bridge
The Brooklyn Bridge, an early example of a steel-wire suspension bridge, uses a hybrid cable-stayed/suspension bridge design, with both vertical and diagonal suspender cables.
Its stone towers are neo-Gothic, with characteristic pointed arches. The New York City Department of Transportation (NYCDOT), which maintains the bridge, says that its original paint scheme was "Brooklyn Bridge Tan" and "Silver", although a writer for The New York Post states that it was originally entirely "Rawlins Red".
The Deck of the Brooklyn Bridge
To provide sufficient clearance for shipping in the East River, the Brooklyn Bridge incorporates long approach viaducts on either end to raise it from low ground on both shores.
Including approaches, the Brooklyn Bridge is a total of 6,016 feet (1,834 m) long. The main span between the two suspension towers is 1,595.5 feet (486.3 m) long, and 85 feet (26 m) wide.
The bridge elongates and contracts between the extremes of temperature from 14 to 16 inches. Navigational clearance is 127 ft (38.7 m) above mean high water. A 1909 Engineering Magazine article said that, at the center of the span, the height could fluctuate by more than 9 feet (2.7 m) due to temperature and traffic loads.
At the time of construction, engineers had not yet discovered the aerodynamics of bridge construction, and bridge designs were not tested in wind tunnels.
It was coincidental that the open truss structure supporting the deck is, by its nature, subject to fewer aerodynamic problems. This is because John Roebling designed the Brooklyn Bridge's truss system to be six to eight times stronger than he thought it needed to be.
However, due to a supplier's fraudulent substitution of inferior-quality cable in the initial construction, the bridge was reappraised at the time as being only four times as strong as necessary.
The Brooklyn Bridge can hold a total load of 18,700 short tons, a design consideration from when it originally carried heavier elevated trains.
An elevated pedestrian-only promenade runs in between the two roadways and 18 feet (5.5 m) above them. The path is 10 to 17 feet (3.0 to 5.2 m) wide. The iron railings were produced by Janes & Kirtland, a Bronx iron foundry that also made the United States Capitol dome and the Bow Bridge in Central Park.
The Cables of Brooklyn Bridge
The Brooklyn Bridge contains four main cables, which descend from the tops of the suspension towers and support the deck. Each main cable measures 15.75 inches (40.0 cm) in diameter, and contains 5,282 parallel, galvanized steel wires wrapped closely together. These wires are bundled in 19 individual strands, with 278 wires to a strand.
This was the first use of bundling in a suspension bridge, and took several months for workers to tie together. Since the 2000's, the main cables have also supported a series of 24-watt LED lighting fixtures, referred to as "necklace lights" due to their shape.
1,520 galvanized steel wire suspender cables hang downward from the main cables.
Brooklyn Bridge Anchorages
Each side of the bridge contains an anchorage for the main cables. The anchorages are limestone structures located slightly inland, measuring 129 by 119 feet (39 by 36 m) at the base and 117 by 104 feet (36 by 32 m) at the top.
Each anchorage weighs 60,000 short tons. The Manhattan anchorage rests on a foundation of bedrock, while the Brooklyn anchorage rests on clay.
The anchorages contain numerous passageways and compartments. Starting in 1876, in order to fund the bridge's maintenance, the New York City government made the large vaults under the bridge's Manhattan anchorage available for rent, and they were in constant use during the early 20th. century.
The vaults were used to store wine, as they maintained a consistent 60 °F (16 °C) temperature due to a lack of air circulation. The Manhattan vault was called the "Blue Grotto" because of a shrine to the Virgin Mary next to an opening at the entrance.
The vaults were closed for public use in the late 1910's and 1920's during the Great War and Prohibition, but were reopened thereafter.
When New York magazine visited one of the cellars in 1978, it discovered a fading inscription on a wall reading:
"Who loveth not wine, women and song,
he remaineth a fool his whole life long."
Leaks found within the vault's spaces necessitated repairs during the late 1980's and early 1990's. By the late 1990's, the chambers were being used to store maintenance equipment.
The Towers of the Brooklyn Bridge
The bridge's two suspension towers are 278 feet (85 m) tall, with a footprint of 140 by 59 feet (43 by 18 m) at the high water line.
They are built of limestone, granite, and Rosendale cement. The limestone was quarried at the Clark Quarry in Essex County, New York. The granite blocks were quarried and shaped on Vinalhaven Island, Maine, under a contract with the Bodwell Granite Company, and delivered from Maine to New York by schooner.
The Manhattan tower contains 46,945 cubic yards (35,892 m3) of masonry, while the Brooklyn tower has 38,214 cubic yards (29,217 m3) of masonry.
Each tower contains a pair of Gothic Revival pointed arches, through which the roadways run. The arch openings are 117 feet (36 m) tall and 33.75 feet (10.29 m) wide.
The Brooklyn Bridge Caissons
The towers rest on underwater caissons made of southern yellow pine. Both caissons contain interior spaces that were used by construction workers. The Manhattan side's caisson is slightly larger, measuring 172 by 102 feet (52 by 31 m) and located 78.5 feet (23.9 m) below high water, while the Brooklyn side's caisson measures 168 by 102 feet (51 by 31 m) and is located 44.5 feet (13.6 m) below high water.
The caissons were designed to hold at least the weight of the towers which would exert a pressure of 5 short tons per square foot when fully built, but the caissons were over-engineered for safety.
During an accident on the Brooklyn side, when air pressure was lost and the partially-built towers dropped full-force down, the caisson sustained an estimated pressure of 23 short tons per square foot with only minor damage. Most of the timber used in the bridge's construction, including in the caissons, came from mills at Gascoigne Bluff on St. Simons Island, Georgia.
The Brooklyn side's caisson, which was built first, originally had a height of 9.5 feet (2.9 m) and a ceiling composed of five layers of timber, each layer 1 foot (0.30 m) tall. Ten more layers of timber were later added atop the ceiling, and the entire caisson was wrapped in tin and wood for further protection against flooding.
The thickness of the caisson's sides was 8 feet (2.4 m) at both the bottom and the top. The caisson had six chambers: two each for dredging, supply shafts, and airlocks.
The caisson on the Manhattan side was slightly different because it had to be installed at a greater depth. To protect against the increased air pressure at that depth, the Manhattan caisson had 22 layers of timber on its roof, seven more than its Brooklyn counterpart had. The Manhattan caisson also had fifty 4-inch (10 cm)-diameter pipes for sand removal, a fireproof iron-boilerplate interior, and different airlocks and communication systems.
History of the Brooklyn Bridge
Proposals for a bridge between the then-separate cities of Brooklyn and New York had been suggested as early as 1800. At the time, the only travel between the two cities was by a number of ferry lines.
Engineers presented various designs, such as chain or link bridges, though these were never built because of the difficulties of constructing a high enough fixed-span bridge across the extremely busy East River.
There were also proposals for tunnels under the East River, but these were considered prohibitively expensive. The current Brooklyn Bridge was conceived by German immigrant John Augustus Roebling in 1852.
He had previously designed and constructed shorter suspension bridges, such as Roebling's Delaware Aqueduct in Lackawaxen, Pennsylvania, and the John A. Roebling Suspension Bridge between Cincinnati, Ohio, and Covington, Kentucky.
In February 1867, the New York State Senate passed a bill that allowed the construction of a suspension bridge from Brooklyn to Manhattan.
Two months later, the New York and Brooklyn Bridge Company was incorporated. There were twenty trustees in total: eight each appointed by the mayors of New York and Brooklyn, as well as the mayors of each city and the auditor and comptroller of Brooklyn.
The company was tasked with constructing what was then known as the New York and Brooklyn Bridge. Alternatively, the span was just referred to as the "Brooklyn Bridge", a name originating in a 25th. January 1867 letter to the editor of the Brooklyn Daily Eagle.
The act of incorporation, which became law on the 16th. April 1867, authorized the cities of New York (now Manhattan) and Brooklyn to subscribe to $5 million in capital stock, which would fund the bridge's construction.
Roebling was subsequently named as the main engineer of the work, and by September 1867, he had presented a master plan of a bridge that would be longer and taller than any suspension bridge previously built.
It would incorporate roadways and elevated rail tracks, whose tolls and fares would provide the means to pay for the bridge's construction. It would also include a raised promenade that served as a leisurely pathway.
The proposal received much acclaim in both cities, and residents predicted that the New York and Brooklyn Bridge's opening would have as much of an impact as the Suez Canal, the first transatlantic telegraph cable, or the first transcontinental railroad.
By early 1869, however, some individuals started to criticize the project, saying either that the bridge was too expensive, or that the construction process was too difficult.
To allay concerns about the design of the New York and Brooklyn Bridge, Roebling set up a "Bridge Party" in March 1869, where he invited engineers and members of U.S. Congress to see his other spans. Following the bridge party in April, Roebling and several engineers conducted final surveys.
During these surveys, it was determined that the main span would have to be raised from 130 to 135 feet (40 to 41 m), requiring several changes to the overall design.
In June 1869, while conducting these surveys, Roebling sustained a crush injury to his foot when a ferry pinned it against a piling. After amputation of his crushed toes, he developed a tetanus infection that left him incapacitated and resulted in his death the following month.
Washington Roebling, John Roebling's 32-year-old son, was then hired to fill his father's role. When the younger Roebling was hired, Tammany Hall leader William M. Tweed also became involved in the bridge's construction because, as a major landowner in New York City, he had an interest in the project's completion.
The New York and Brooklyn Bridge Company - later known simply as the New York Bridge Company - was actually overseen by Tammany Hall, and it approved Roebling's plans and designated him as chief engineer of the project.
Construction of the Brooklyn Bridge
The Caissons
Construction of the Brooklyn Bridge began on the 2nd. January 2, 1870. The first work entailed the construction of two caissons, upon which the suspension towers would be built.
A caisson is a large watertight chamber, open at the bottom, from which the water is kept out by air pressure and in which construction work may be carried out under water.
The Brooklyn side's caisson was built at the Webb & Bell shipyard in Greenpoint, Brooklyn, and was launched into the river on the 19th. March 1870. Compressed air was pumped into the caisson, and workers entered the space to dig the sediment until it sank to the bedrock. As one sixteen-year-old from Ireland, Frank Harris, described the fearful experience:
"The six of us were working naked to the waist
in the small iron chamber with the temperature
of about 80 degrees Fahrenheit.
In five minutes the sweat was pouring from us,
and all the while we were standing in icy water
that was only kept from rising by the terrific
pressure. No wonder the headaches were
blinding."
Once the caisson had reached the desired depth, it was to be filled in with vertical brick piers and concrete. However, due to the unexpectedly high concentration of large boulders on the riverbed, the Brooklyn caisson took several months to sink to the desired depth.
Furthermore, in December 1870, its timber roof caught fire, delaying construction further. The "Great Blowout", as the fire was called, delayed construction for several months, since the holes in the caisson had to be repaired.
On the 6th. March 1871, the repairs were finished, and the caisson had reached its final depth of 44.5 feet (13.6 m); it was filled with concrete five days later. Overall, about 264 individuals were estimated to have worked in the caisson every day, but because of high worker turnover, the final total was thought to be about 2,500 men.
In spite of this, only a few workers were paralyzed. At its final depth, the caisson's air pressure was 21 pounds per square inch. Normal air pressure is 14.7 psi.
The Manhattan side's caisson was the next structure to be built. To ensure that it would not catch fire like its counterpart had, the Manhattan caisson was lined with fireproof plate iron.
It was launched from Webb & Bell's shipyard on the 11th. May 1871, and maneuvered into place that September.
Due to the extreme underwater air pressure inside the much deeper Manhattan caisson, many workers became sick with "the bends" - decompression sickness - during this work, despite the incorporation of airlocks (which were believed to help with decompression sickness at the time).
This condition was unknown at the time, and was first called "caisson disease" by the project physician, Andrew Smith. Between the 25th. January and the 31st. May 1872, Smith treated 110 cases of decompression sickness, while three workers died from the condition.
When iron probes underneath the Manhattan caisson found the bedrock to be even deeper than expected, Washington Roebling halted construction due to the increased risk of decompression sickness.
After the Manhattan caisson reached a depth of 78.5 feet (23.9 m) with an air pressure of 35 pounds per square inch, Washington deemed the sandy subsoil overlying the bedrock 30 feet (9.1 m) beneath to be sufficiently firm, and subsequently infilled the caisson with concrete in July 1872.
Washington Roebling himself suffered a paralyzing injury as a result of caisson disease shortly after ground was broken for the Brooklyn tower foundation.
His debilitating condition left him unable to supervise the construction in person, so he designed the caissons and other equipment from his apartment, directing the completion of the bridge through a telescope in his bedroom.
His wife, Emily Warren Roebling, not only provided written communications between her husband and the engineers on site, but also understood mathematics, calculations of catenary curves, strengths of materials, bridge specifications, and the intricacies of cable construction.
She spent the next 11 years helping supervise the bridge's construction, taking over much of the chief engineer's duties, including day-to-day supervision and project management.
The Towers of the Brooklyn Bridge
After the caissons were completed, piers were constructed on top of each of them upon which masonry towers would be built. The towers' construction was a complex process that took four years.
Since the masonry blocks were heavy, the builders transported them to the base of the towers using a pulley system with a continuous 1.5-inch (3.8 cm)-diameter steel wire rope, operated by steam engines at ground level.
The blocks were then carried up on a timber track alongside each tower and maneuvered into the proper position using a derrick atop the towers. The blocks sometimes vibrated the ropes because of their weight, but only once did a block fall.
Construction of the suspension towers started in mid-1872, and by the time work was halted for the winter in late 1872, parts of each tower had already been built. By mid-1873, there was substantial progress on the towers' construction.
The arches of the Brooklyn tower were completed by August 1874. The tower was substantially finished by December 1874, with the erection of saddle plates for the main cables at the top of the tower.
The last stone on the Brooklyn tower was raised in June 1875, and the Manhattan tower was completed in July 1876.
The work was dangerous: by 1876, three workers had died having fallen from the towers, while nine other workers were killed in other accidents.
By 1875, while the towers were being constructed, the project had depleted its original $5 million budget. Two bridge commissioners, one each from Brooklyn and Manhattan, petitioned New York state lawmakers to allot another $8 million for construction. Legislators authorized the money on condition that the cities would buy the stock of Brooklyn Bridge's private stockholders.
Work proceeded concurrently on the anchorages on each side. The Brooklyn anchorage broke ground in January 1873 and was substantially completed by August 1875.
The Manhattan anchorage was built in less time. Having started in May 1875, it was mostly completed by July 1876. The anchorages could not be fully completed until the main cables were spun, at which point another 6 feet (1.8 m) would be added to the height of each 80-foot (24 m) anchorage.
The Brooklyn Bridge Cables
The first temporary wire was stretched between the towers on the 15th. August 1876, using chrome steel provided by the Chrome Steel Company of Brooklyn. The wire was then stretched back across the river, and the two ends were spliced to form a traveler, a lengthy loop of wire connecting the towers, which was driven by a 30 horsepower (22 kW) steam hoisting engine at ground level.
The wire was one of two that were used to create a temporary footbridge for workers while cable spinning was ongoing. The next step was to send an engineer across the completed traveler wire in a boatswain's chair slung from the wire, to ensure it was safe enough.
The bridge's master mechanic, E. F. Farrington, was volunteered for this task, and an estimated crowd of 10,000 people on both shores watched him cross.
A second traveler wire was then stretched across the span. The temporary footbridge, located some 60 feet (18 m) above the elevation of the future deck, was completed in February 1877.
By December 1876, a steel contract for the permanent cables still had not been awarded. There was disagreement over whether the bridge's cables should use the as-yet-untested Bessemer steel, or the well-proven crucible steel.
Until a permanent contract was awarded, the builders ordered 30 short tons of wire in the interim, 10 tons each from three companies, including Washington Roebling's own steel mill in Brooklyn.
In the end, it was decided to use number 8 Birmingham gauge (approximately 4 mm or 0.165 inches in diameter) crucible steel, and a request for bids was distributed, to which eight companies responded.
In January 1877, a contract for crucible steel was awarded to J. Lloyd Haigh, who was associated with bridge trustee Abram Hewitt, whom Roebling distrusted.
The spinning of the wires required the manufacture of large coils of it which were galvanized but not oiled when they left the factory. The coils were delivered to a yard near the Brooklyn anchorage. There they were dipped in linseed oil, hoisted to the top of the anchorage, dried out and spliced into a single wire, and finally coated with red zinc for further galvanizing.
There were thirty-two drums at the anchorage yard, eight for each of the four main cables. Each drum had a capacity of 60,000 feet (18,000 m) of wire. The first experimental wire for the main cables was stretched between the towers on the 29th. May 29 1877, and spinning began two weeks later.
All four main cables had been strung by that July. During that time, the temporary footbridge was unofficially opened to members of the public, who could receive a visitor's pass; by August 1877 several thousand visitors from around the world had used the footbridge. The visitor passes ceased that September after a visitor had an epileptic seizure and nearly fell off.
As the wires were being spun, work also commenced on the demolition of buildings on either side of the river for the Brooklyn Bridge's approaches; this work was mostly complete by September 1877. The following month, initial contracts were awarded for the suspender wires, which would hang down from the main cables and support the deck. By May 1878, the main cables were more than two-thirds complete.
However, the following month, one of the wires slipped, killing two people and injuring three others. In 1877, Hewitt wrote a letter urging against the use of Bessemer steel in the bridge's construction. Bids had been submitted for both crucible steel and Bessemer steel; John A. Roebling's Sons submitted the lowest bid for Bessemer steel, but at Hewitt's direction, the contract was awarded to Haigh.
A subsequent investigation discovered that Haigh had substituted inferior quality wire in the cables. Of eighty rings of wire that were tested, only five met standards, and it was estimated that Haigh had earned $300,000 from the deception.
At this point, it was too late to replace the cables that had already been constructed. Roebling determined that the poorer wire would leave the bridge only four times as strong as necessary, rather than six to eight times as strong. The inferior-quality wire was allowed to remain, and 150 extra wires were added to each cable.
To avoid public controversy, Haigh was not fired, but instead was required to personally pay for higher-quality wire. The contract for the remaining wire was awarded to the John A. Roebling's Sons, and by the 5th. October 1878, the last of the main cables' wires went over the river.
After the suspender wires had been placed, workers began erecting steel crossbeams to support the roadway as part of the bridge's overall superstructure. Construction on the bridge's superstructure started in March 1879, but, as with the cables, the trustees initially disagreed on whether the steel superstructure should be made of Bessemer or crucible steel.
That July, the trustees decided to award a contract for 500 short tons of Bessemer steel to the Edgemoor Iron Works, based in Philadelphia. The trustees later ordered another 500 short tons of Bessemer steel. However, by February 1880 the steel deliveries had not started.
That October, the bridge trustees questioned Edgemoor's president about the delay in steel deliveries. Despite Edgemoor's assurances that the contract would be fulfilled, the deliveries still had not been completed by November 1881.
Brooklyn mayor Seth Low, who became part of the board of trustees in 1882, became the chairman of a committee tasked to investigate Edgemoor's failure to fulfill the contract. When questioned, Edgemoor's president stated that the delays were the fault of another contractor, the Cambria Iron Company, who were manufacturing the eyebars for the bridge trusses.
Further complicating the situation, Washington Roebling had failed to appear at the trustees' meeting in June 1882, since he had gone to Newport, Rhode Island. After the news media discovered this, most of the newspapers called for Roebling to be fired as chief engineer, except for the Daily State Gazette of Trenton, New Jersey, and the Brooklyn Daily Eagle.
Some of the longstanding trustees were willing to vouch for Roebling, since construction progress on the Brooklyn Bridge was still ongoing. However, Roebling's behavior was considered suspect among the younger trustees who had joined the board more recently.
Construction progress on the bridge itself was submitted in formal monthly reports to the mayors of New York and Brooklyn. For example, the August 1882 report noted that the month's progress included 114 intermediate cords erected within a week, as well as 72 diagonal stays, 60 posts, and numerous floor beams, bridging trusses, and stay bars.
By early 1883, the Brooklyn Bridge was considered mostly completed and was projected to open that June. Contracts for bridge lighting were awarded by February 1883, and a toll scheme was approved that March.
Opposition to the Bridge
There was substantial opposition to the bridge's construction from shipbuilders and merchants located to the north, who argued that the bridge would not provide sufficient clearance underneath for ships.
In May 1876, these groups, led by Abraham Miller, filed a lawsuit in the United States District Court against the cities of New York and Brooklyn.
In 1879, an Assembly Sub-Committee on Commerce and Navigation began an investigation into the Brooklyn Bridge. A seaman who had been hired to determine the height of the span, testified to the committee about the difficulties that ship masters would experience in bringing their ships under the bridge when it was completed.
Another witness, Edward Wellman Serrell, a civil engineer, said that the calculations of the bridge's assumed strength were incorrect.
However the Supreme Court decided in 1883 that the Brooklyn Bridge was a lawful structure.
The Opening of the Brooklyn Bridge
The Brooklyn Bridge was opened for use on the 24th. May 1883. Thousands of people attended the opening ceremony, and many ships were present in the East River for the occasion. Officially, Emily Warren Roebling was the first to cross the bridge.
The bridge opening was also attended by U.S. president Chester A. Arthur and New York mayor Franklin Edson, who crossed the bridge and shook hands with Brooklyn mayor Seth Low at the Brooklyn end. Abram Hewitt gave the principal address:
"It is not the work of any one man or of any one
age. It is the result of the study, of the experience,
and of the knowledge of many men in many ages.
It is not merely a creation; it is a growth. It stands
before us today as the sum and epitome of human
knowledge; as the very heir of the ages; as the
latest glory of centuries of patient observation,
profound study and accumulated skill, gained,
step by step, in the never-ending struggle of man
to subdue the forces of nature to his control and use."
Although Washington Roebling was unable to attend the ceremony (and rarely visited the site again), he held a celebratory banquet at his house on the day of the bridge opening.
Further festivity included a performance by a band, gunfire from ships, and a fireworks display. On that first day, a total of 1,800 vehicles and 150,300 people crossed the span.
Less than a week after the Brooklyn Bridge opened, ferry crews reported a sharp drop in patronage, while the bridge's toll operators were processing over a hundred people a minute. However, cross-river ferries continued to operate until 1942.
The bridge had cost US$15.5 million in 1883 dollars (about US$436,232,000 in 2021) to build, of which Brooklyn paid two-thirds. The bonds to fund the construction were not paid off until 1956.
An estimated 27 men died during the bridge's construction. Until the construction of the nearby Williamsburg Bridge in 1903, the Brooklyn Bridge was the longest suspension bridge in the world, 20% longer than any built previously.
At the time of opening, the Brooklyn Bridge was not complete; the proposed public transit across the bridge was still being tested, while the Brooklyn approach was being completed.
On the 30th. May 1883, six days after the opening, a woman falling down a stairway at the Brooklyn approach caused a stampede which resulted in at least twelve people being crushed and killed.
In subsequent lawsuits, the Brooklyn Bridge Company was acquitted of negligence. However, the company did install emergency phone boxes and additional railings, and the trustees approved a fireproofing plan for the bridge.
Public transit service began with the opening of the New York and Brooklyn Bridge Railway, a cable car service, on the 25th. September 1883.
On the 17th. May 1884, one of P. T. Barnum's most famous attractions, Jumbo the elephant, led a parade of 21 elephants over the Brooklyn Bridge. This helped to lessen doubts about the bridge's stability while also promoting Barnum's circus.
Brooklyn Bridge in the Late 19th. & Early 20th. Centuries
Movement across the Brooklyn Bridge increased in the years after it opened; a million people paid to cross in the first six months. The bridge carried 8.5 million people in 1884, its first full year of operation; this number doubled to 17 million in 1885, and again to 34 million in 1889.
Many of these people were cable car passengers. Additionally, about 4.5 million pedestrians a year were crossing the bridge for free by 1892.
The first proposal to make changes to the bridge was sent in only two and a half years after it opened; Linda Gilbert suggested glass steam-powered elevators and an observatory be added to the bridge and a fee charged for use, which would in part fund the bridge's upkeep and in part fund her prison reform charity.
This proposal was considered, but not acted upon. Numerous other proposals were made during the first fifty years of the bridge's life.
Trolley tracks were added in the center lanes of both roadways in 1898, allowing trolleys to use the bridge as well.
Concerns about the Brooklyn Bridge's safety were raised during the turn of the century. In 1898, traffic backups due to a dead horse caused one of the truss cords to buckle.
There were more significant worries after twelve suspender cables snapped in 1901, although a thorough investigation found no other defects.
After the 1901 incident, five inspectors were hired to examine the bridge each day, a service that cost $250,000 a year.
The Brooklyn Rapid Transit Company, which operated routes across the Brooklyn Bridge, issued a notice in 1905 saying that the bridge had reached its transit capacity.
Although a second deck for the Brooklyn Bridge was proposed, it was thought to be infeasible because doing so would overload the bridge's structural capacity.
Though tolls had been instituted for carriages and cable-car customers since the bridge's opening, pedestrians were spared from the tolls originally. However, by the first decade of the 20th. century, pedestrians were also paying tolls.
However tolls on all four bridges across the East River - the Brooklyn Bridge, as well as the Manhattan, Williamsburg, and Queensboro bridges to the north - were abolished in July 1911 as part of a populist policy initiative headed by New York City mayor William Jay Gaynor.
Ostensibly in an attempt to reduce traffic on nearby city streets, Grover Whalen, the commissioner of Plant and Structures, banned motor vehicles from the Brooklyn Bridge in 1922. The real reason for the ban was an incident the same year where two cables slipped due to high traffic loads.
Both Whalen and Roebling called for the renovation of the Brooklyn Bridge and the construction of a parallel bridge, although the parallel bridge was never built.
Brooklyn Bridge in Mid- to late 20th. Century
Upgrades to the Bridge
The first major upgrade to the Brooklyn Bridge commenced in 1948, when a contract for redesigning the roadways was awarded to David B. Steinman. The renovation was expected to double the capacity of the bridge's roadways to nearly 6,000 cars per hour, at a projected cost of $7 million.
The renovation included the demolition of both the elevated and the trolley tracks on the roadways and the widening of each roadway from two to three lanes, as well as the construction of a new steel-and-concrete floor.
In addition, new ramps were added to Adams Street, Cadman Plaza, and the Brooklyn Queens Expressway (BQE) on the Brooklyn side, and to Park Row on the Manhattan side. The trolley tracks closed in March 1950 to allow for the widening work to occur.
During the construction project, one roadway at a time was closed, allowing reduced traffic flows to cross the bridge in one direction only. The widened south roadway was completed in May 1951, followed by the north roadway in October 1953. In addition, defensive barriers were added to the bridge as a safeguard against sabotage.
The restoration was finished in May 1954 with the completion of the reconstructed elevated promenade.
While the rebuilding of the span was ongoing, a fallout shelter was constructed beneath the Manhattan approach in anticipation of the Cold War. The abandoned space in one of the masonry arches was stocked with emergency survival supplies for a potential nuclear attack by the Soviet Union; these supplies were still in place half a century later.
A repainting of the bridge was announced in advance of its 90th. anniversary.
Deterioration and Late-20th. Century Repair
The Brooklyn Bridge gradually deteriorated due to age and neglect. While it had 200 full-time dedicated maintenance workers before World War II, that number had dropped to five by the late 20th. century, and the city as a whole only had 160 bridge maintenance workers.
In 1974, heavy vehicles such as vans and buses were banned from the bridge to prevent further erosion of the concrete roadway. A report in The New York Times four years later noted that the cables were visibly fraying, and that the pedestrian promenade had holes in it.
The city began planning to replace all the Brooklyn Bridge's cables at a cost of $115 million, as part of a larger project to renovate all four toll-free East River spans.
By 1980, the Brooklyn Bridge was in such dire condition that it faced imminent closure. In some places, half of the strands in the cables were broken.
In June 1981, two of the diagonal stay cables snapped, seriously injuring a pedestrian who later died. Subsequently, the anchorages were found to have developed rust, and an emergency cable repair was necessitated less than a month later after another cable developed slack.
Following the incident, the city accelerated the timetable of its proposed cable replacement, and it commenced a $153 million rehabilitation of the Brooklyn Bridge in advance of the 100th anniversary.
As part of the project, the bridge's original suspender cables installed by J. Lloyd Haigh were replaced by Bethlehem Steel in 1986, marking the cables' first replacement since construction. In a smaller project, the bridge was floodlit at night, starting in 1982 to highlight its architectural features.
Additional problems persisted, and in 1993, high levels of lead were discovered near the bridge's towers. Further emergency repairs were undertaken in mid-1999 after small concrete shards began falling from the bridge into the East River. The concrete deck had been installed during the 1950's renovations, and had a lifespan of about 60 years.
Brooklyn Bridge in the 21st. Century
The Park Row exit from the bridge's westbound lanes was closed as a safety measure after the September 11, 2001, attacks on the nearby World Trade Center. That section of Park Row was closed since it ran right underneath 1 Police Plaza, the headquarters of the New York City Police Department.
In early 2003, to save money on electricity, the bridge's "necklace lights" were turned off at night. They were turned back on later that year after several private entities made donations to fund the lights.
After the 2007 collapse of the I-35W bridge in Minneapolis, public attention focused on the condition of bridges across the U.S. The New York Times reported that the Brooklyn Bridge approach ramps had received a "poor" rating during an inspection in 2007.
However, a NYCDOT spokesman said that the poor rating did not indicate a dangerous state but rather implied it required renovation. In 2010, the NYCDOT began renovating the approaches and deck, as well as repainting the suspension span.
Work included widening two approach ramps from one to two lanes by re-striping a new prefabricated ramp; seismic retrofitting; replacement of rusted railings and safety barriers; and road deck resurfacing. The work necessitated detours for four years.
At the time, the project was scheduled to be completed in 2014, but completion was later delayed to 2015, then again to 2017. The project's cost also increased from $508 million in 2010 to $811 million in 2016.
In August 2016, after the renovation had been completed, the NYCDOT announced that it would conduct a seven-month, $370,000 study to verify if the bridge could support a heavier upper deck that consisted of an expanded bicycle and pedestrian path.
As of 2016, about 10,000 pedestrians and 3,500 cyclists used the pathway on an average weekday. Work on the pedestrian entrance on the Brooklyn side was underway by 2017.
The NYCDOT also indicated in 2016 that it planned to reinforce the Brooklyn Bridge's foundations to prevent it from sinking, as well as repair the masonry arches on the approach ramps, which had been damaged by Hurricane Sandy in 2012.
In July 2018, the New York City Landmarks Preservation Commission approved a further renovation of the Brooklyn Bridge's suspension towers and approach ramps. That December, the federal government gave the city $25 million in funding, which would contribute to a $337 million rehabilitation of the bridge approaches and the suspension towers. Work started in late 2019 and was scheduled to be completed in 2023.
Usage of the Brooklyn Bridge
Horse-drawn carriages have been allowed to use the Brooklyn Bridge's roadways since its opening. Originally, each of the two roadways carried two lanes of a different direction of traffic. The lanes were relatively narrow at only 8 feet (2.4 m) wide. In 1922, motor vehicles were banned from the bridge, while horse-drawn carriages were restricted from the Manhattan Bridge. Thereafter, the only vehicles allowed on the Brooklyn Bridge were horse-drawn.
By 1950, the main roadway carried six lanes of automobile traffic, three in each direction. It was then reduced to five lanes with the addition of a two-way bike lane on the Manhattan-bound side in 2021.
Because of the roadway's height (11 ft (3.4 m)) and weight (6,000 lb (2,700 kg)) restrictions, commercial vehicles and buses are prohibited from using the Brooklyn Bridge.
The weight restrictions prohibit heavy passenger vehicles such as pickup trucks and SUVs from using the bridge, though this is not often enforced in practice.
Formerly, rail traffic operated on the Brooklyn Bridge as well. Cable cars and elevated railroads used the bridge until 1944, while trolleys ran until 1950.
A cable car service began operating on the 25th. September 1883; it ran on the inner lanes of the bridge, between terminals at the Manhattan and Brooklyn ends.
Since Washington Roebling believed that steam locomotives would put excessive loads upon the structure of the Brooklyn Bridge, the cable car line was designed as a steam/cable-hauled hybrid.
They were powered from a generating station under the Brooklyn approach. The cable cars could not only regulate their speed on the 3.75% upward and downward approaches, but also maintain a constant interval between each other. There were 24 cable cars in total.
Initially, the service ran with single-car trains, but patronage soon grew so much that by October 1883, two-car trains were in use. The line carried three million people in the first six months, nine million in 1884, and nearly 20 million in 1885.
Patronage continued to increase, and in 1888, the tracks were lengthened and even more cars were constructed to allow for four-car cable car trains. Electric wires for the trolleys were added by 1895, allowing for the potential future decommissioning of the steam/cable system.
The terminals were rebuilt once more in July 1895, and, following the implementation of new electric cars in late 1896, the steam engines were dismantled and sold.
The Brooklyn Bridge Walkway
The Brooklyn Bridge has an elevated promenade open to pedestrians in the center of the bridge, located 18 feet (5.5 m) above the automobile lanes.
The path is generally 10 to 17 feet (3.0 to 5.2 m) wide, though this is constrained by obstacles such as protruding cables, benches, and stairways, which create "pinch points" at certain locations. The path narrows to 10 feet (3.0 m) at the locations where the main cables descend to the level of the promenade.
Further exacerbating the situation, these "pinch points" are some of the most popular places to take pictures. As a result, in 2016, the NYCDOT announced that it planned to double the promenade's width.
On the 14th. September 2021, the DOT closed off the inner-most car lane on the Manhattan-bound side with protective barriers and fencing to create a new bike path. Cyclists are now prohibited from the upper pedestrian lane.
Emergency Use of Brooklyn Bridge
While the bridge has always permitted the passage of pedestrians, the promenade facilitates movement when other means of crossing the East River have become unavailable.
During transit strikes by the Transport Workers Union in 1980 and 2005, people commuting to work used the bridge; they were joined by Mayors Ed Koch and Michael Bloomberg, who crossed as a gesture to the affected public.
Pedestrians also walked across the bridge as an alternative to suspended subway services following the 1965, 1977, and 2003 blackouts, and after the September 11 attacks on the World Trade Center.
During the 2003 blackouts, many crossing the bridge reported a swaying motion. The higher-than-usual pedestrian load caused this swaying, which was amplified by the tendency of pedestrians to synchronize their footfalls with a sway.
Several engineers expressed concern about how this would affect the bridge, although others noted that the bridge did withstand the event and that the redundancies in its design - the inclusion of the three support systems (suspension system, diagonal stay system, and stiffening truss) - make it probably the best secured bridge against such movements going out of control.
In designing the bridge, John Roebling had stated that the bridge would sag but not fall, even if one of these structural systems were to fail altogether.
Stunts Associated With Brooklyn Bridge
There have been several notable jumpers from the Brooklyn Bridge:
-- The first person was Robert Emmet Odlum, brother of women's rights activist Charlotte Odlum Smith, on the 19th. May 1885. He struck the water at an angle, and died shortly afterwards from internal injuries.
-- Steve Brodie supposedly dropped from underneath the bridge in July 1886 and was briefly arrested for it, although there is some doubt about whether he actually jumped.
-- Larry Donovan made a slightly higher jump from the railing a month afterward.
Other notable events have taken place on or near the bridge:
-- In 1919, Giorgio Pessi piloted what was then one of the world's largest airplanes, the Caproni Ca.5, under the bridge.
-- At 9:00 a.m. on the 19th. May 1977, artist Jack Bashkow climbed one of the towers for 'Bridging', which was termed a "media sculpture" by the performance group Art Corporation of America Inc.
Seven artists climbed the largest bridges connected to Manhattan in order to:
"Replace violence and fear
in mass media for one day".
When each of the artists had reached the tops of the bridges, they ignited bright-yellow flares at the same moment, resulting in rush hour traffic disruption, media attention, and the arrest of the climbers, though the charges were later dropped.
Called "The first social-sculpture to use mass-media as art” by conceptual artist Joseph Beuys, the event was on the cover of the New York Post, it received international attention, and received ABC Eyewitness News' 1977 Best News of the Year award.
John Halpern documented the incident in the film 'Bridging' (1977)
-- Halpern attempted another "Bridging" "social sculpture" in 1979, when he planted a radio receiver, gunpowder and fireworks in a bucket atop one of the Brooklyn Bridge towers.
The piece was later discovered by police, leading to his arrest for possessing a bomb.
-- In 1993, bridge jumper Thierry Devaux illegally performed eight acrobatic bungee jumps above the East River close to the Brooklyn tower.
-- On the 1st. October 2011, more than 700 protesters with the Occupy Wall Street movement were arrested while attempting to march across the bridge on the roadway.
Protesters disputed the police account of the event, and claimed that the arrests were the result of being trapped on the bridge by the NYPD. The majority of the arrests were subsequently dismissed.
-- On the 22nd. July 2014, the two American flags on the flagpoles atop each tower were found to have been replaced by bleached-white American flags.
Initially, cannabis activism was suspected as a motive, but on the 12th. August 2014, two Berlin artists claimed responsibility for hoisting the two white flags, having switched the original flags with their replicas.
The artists said that the flags were meant to celebrate the beauty of public space and the anniversary of the death of German-born John Roebling, and they denied that it was an anti-American statement.
Brooklyn Bridge as a Suicide Spot
The first person to jump from the bridge with the intention of suicide was Francis McCarey in 1892.
A lesser-known early jumper was James Duffy of County Cavan, Ireland, who on the 15th. April 1895 asked several men to watch him jump from the bridge. Duffy jumped and was not seen again.
Additionally, the cartoonist Otto Eppers jumped and survived in 1910, and was then tried and acquitted for attempted suicide.
The Brooklyn Bridge has since developed a reputation as a suicide bridge due to the number of jumpers who do so intending to kill themselves, though exact statistics are difficult to find.
Crimes and Terrorism Associated With Brooklyn Bridge
-- In 1979, police disarmed a stick of dynamite placed under the Brooklyn approach, and an artist in Manhattan was later arrested for the act.
-- On the 1st. March 1994, Lebanese-born Rashid Baz opened fire on a van carrying members of the Chabad-Lubavitch Orthodox Jewish Movement, striking 16-year-old student Ari Halberstam and three others traveling on the bridge.
Halberstam died five days later from his wounds, and Baz was later convicted of murder. He was apparently acting out of revenge for the Hebron massacre of Palestinian Muslims a few days prior to the incident.
After initially classifying the killing as one committed out of road rage, the Justice Department reclassified the case in 2000 as a terrorist attack.
The entrance ramp to the bridge on the Manhattan side was subsequently dedicated as the Ari Halberstam Memorial Ramp.
-- In 2003, truck driver Lyman Faris was sentenced to 20 years in prison for providing material support to Al-Qaeda, after an earlier plot to destroy the bridge by cutting through its support wires with blowtorches was thwarted.
Brooklyn Bridge Anniversary Celebrations
-- The 50th.-anniversary celebrations on the 24th. May 1933 included a ceremony featuring an airplane show, ships, and fireworks, as well as a banquet.
-- During the centennial celebrations on the 24th. May 1983, President Ronald Reagan led a cavalcade of cars across the bridge.
A flotilla of ships visited the harbor, officials held parades, and Grucci Fireworks held a fireworks display that evening.
For the centennial, the Brooklyn Museum exhibited a selection of the original drawings made for the bridge.
Culture
The Brooklyn Bridge has had an impact on idiomatic American English. For example, references to "Selling the Brooklyn Bridge" abound in American culture, sometimes as examples of rural gullibility, but more often in connection with an idea that strains credulity.
George C. Parker and William McCloundy were two early 20th.-century con men who may have perpetrated this scam successfully on unwitting tourists, although the author of 'The Brooklyn Bridge: A Cultural History' wrote:
"No evidence exists that the bridge
has ever been sold to a 'gullible
outlander'".
However, anyone taken in by fraudsters is hardly likely to publicize the fact.
A popular tradition on Brooklyn Bridge is for couples to inscribe a date and their initials onto a padlock, attach it to the bridge, and throw the key into the water as a sign of their love.
The practice of attaching 'love locks' to the bridge is officially illegal in New York City, and in theory the NYPD can give violators a $100 fine.
NYCDOT workers periodically remove the love locks from the bridge at a cost of $100,000 per year.
Brooklyn Bridge in the Media
The bridge is often featured in wide shots of the New York City skyline in television and film, and has been depicted in numerous works of art.
Fictional works have used the Brooklyn Bridge as a setting; for instance, the dedication of a portion of the bridge, and the bridge itself, were key components in the 2001 film Kate & Leopold.
Furthermore, the Brooklyn Bridge has also served as an icon of America, with mentions in numerous songs, books, and poems.
Among the most notable of these works is that of American Modernist poet Hart Crane, who used the Brooklyn Bridge as a central metaphor and organizing structure for his second book of poetry, 'The Bridge' (1930).
The Brooklyn Bridge has also been lauded for its architecture. One of the first positive reviews was "The Bridge as a Monument", a Harper's Weekly piece written by architecture critic Montgomery Schuyler and published a week after the bridge's opening.
In the piece, Schuyler wrote:
"It so happens that the work which is likely to be
our most durable monument, and to convey some
knowledge of us to the most remote posterity, is a
work of bare utility; not a shrine, not a fortress, not
a palace, but a bridge."
Architecture critic Lewis Mumford cited the piece as the impetus for serious architectural criticism in the U.S. He wrote that in the 1920's the bridge was a source of joy and inspiration in his childhood, and that it was a profound influence in his adolescence.
Later critics regarded the Brooklyn Bridge as a work of art, as opposed to an engineering feat or a means of transport.
Not all critics appreciated the bridge, however. Henry James, writing in the early 20th. century, cited the bridge as an ominous symbol of the city's transformation into a "steel-souled machine room".
The construction of the Brooklyn Bridge is detailed in numerous media sources, including David McCullough's 1972 book 'The Great Bridge', and Ken Burns's 1981 documentary 'Brooklyn Bridge'.
It is also described in 'Seven Wonders of the Industrial World', a BBC docudrama series with an accompanying book, as well as in 'Chief Engineer: Washington Roebling, The Man Who Built the Brooklyn Bridge', a biography published in 2017.
We have to live with the idea that we can rely on our intelligence and our senses (otherwise normal living wouldn't be possible). Our intelligence says that 2x3 is the same as 3x2. But if we see with our senses that 2x3 can be different from 3x2 (two different underlying structures) then we can get confused. Is there more than we can see or reason?