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During the time the North Bloomfield Gravel Mining Company operated, as many as eight monitors were in use at the same time. Fashioned after Civil War cannons, the large monitors could weigh as much as 1 1/2 tons. The large monitors in the Diggins were capable of using 25 million gallons of water in a 24 hour period or over one million gallons an hour. The wooden box toward the rear of the monitor was loaded with rock to raise the barrel of the monitor and act as a counter balance created by the bucking water pressure leaving the nozzle.
The blasting power of a monitor or water cannon came from elevation drop alone. No mechanical devices were used. The water that came from a nearby resovoir exited in large pipes then graduated down in size until they reached the monitor and through a 10 inch nozzle. A large monitor would blast water at approximately 5,000 pounds per square inch, enough pressure to move a boulder the size of a small car. Different sizes of monitors had various functions. Large monitors were used to bring down the mountain, while small monitors were used to keep the debris moving down the sluice or long toms used to collect the gold and then on to the final exit point.
The miner that operated the monitor was known at the “piper.” He was paid the most for he had to know how to operate that big monster properly. If he didn’t, cave-ins occurred catching men unprepared thus causing injury and even death.
Legend has it that a miner with a dirty shovel set his tool into the stream of the water exiting from the cannon and the force of the water against the shovel moved the monitor’s aim with the greatest of ease and thus led to the invention of the ball and socket design we know today.
Monitors were made at the Joshua Hendy and the Parke and Lacy Company in San Francisco. Also monitors and hydraulic equipment were made locally in the Nevada City Foundry. The Malakoff mine pit on the San Juan Ridge is a testimony to the avarice that was part of the California gold rush, and to one of the nation's first environmental protection measures.
In 1850 there was little gold left in streams. Miners began to discover gold in old riverbeds and on mountainsides high above the streams. In 1851, three miners headed northeast of what is now Nevada City for a less crowded area to prospect. One miner went back to town with a pocket full of gold nuggets for supplies and was followed back by many prospectors. These followers, however, did not find any gold and declared the area "Humbug", thus the stream was so named "Humbug Creek". Around 1852, settlers began to arrive in the area and the town of "Humbug" sprang up. These miners could not decide how to move the dirt to a place where there was water.
By 1853 miners invented a new method of mining called hydraulic mining. Dams were built high in the mountains. The water traveled from the reservoirs through a wooden canal called a flume that was up to forty-five miles long. The water ran swiftly to the canvas hoses and nozzles called monitors waiting in the old river beds. The miners would aim the monitors at the hillsides to wash the gravel into huge sluices. Over time the monitors became bigger and more powerful. Their force was so great they could toss a fifty pound rock like a cannonball or even kill a person. Over 300 Chinese worked on this project and two Chinese settlements existed in North Bloomfield (Humbug).
In the late 1860s, the towns of Marysville and Yuba City were buried under 25 feet of mud and rock, and Sacramento flooded repeatedly. The farmers in the valleys complained about the tailings that flooded their land and ruined their crops. Thousands of acres of rich farmland and property were destroyed as a result of hydraulic mining.
By 1876, the mine was in full operation with 7 giant water cannons working around the clock. The town had grown to a population of around 2000 with various business and daily stage service.
In 1880, electric lights were installed in the mine and the world’s first long distance telephone line was developed to service the mine, passing through North Bloomfield as it made its way from French Corral to Bowman Lake.
By 1883, San Francisco Bay was estimated to be filling with silt at a rate of one foot per year. Debris, silt, and millions of gallons of water used daily by the mine caused extensive flooding, prompting Sacramento valley farmers to file the lawsuit Woodruff v. North Bloomfield Mining and Gravel Company. On January 7, 1884 Judge Lorenzo Sawyer declared hydraulic mining illegal.
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Ergotron Brazo LX para Monitor Pantalla o TV escritorio o mesa en uso junto a una tablet ahora en mexico www.pcalmacen.com
Este es uno de tantos monitores que se utilizan en la UCI que suelo trabajar, en este se pueden apreciar distintas constantes, como la frecuencia cardíaca, la tensión arterial (sistólica, diastólica y media), la presión venosa central, la saturación periférica de Oxigeno
This is my pretty new monitor. I think it fits in beatifully with my $30 garish computer case, old-school keyboard, wireless mouse, and $300 sound system (plugged into my on-board sound card).
I don’t know who created the awesome wallpaper/screensaver that I’m using here, but THANK YOU! My contribution is the video image of Superman and Batman checking out the Batmobile. That started with an image of the wall of the Batcave I’ve built. I then inserted all of the other figures and props, finally creating the in-image computer monitors electronically. Hopefully it all holds together.
BNSF eastbound stack train rounds a curve along the Wenatchee River at Monitor, Washington on May 26, 2005.
This is my new computer monitor I've bought, its a 32" (80cm) Acer LCD TV. Very happy with it so far!
But not functional; went back to the old high-desk, and will use this for breakout projects on the side when needed.
Monitoring long-term alpine ecology plots on Mt. Dunderberg on the Bridgeport Ranger District of the Humboldt-Toiyabe National Forest for the Global Observation And Research In Alpine Environments (GLORIA) Project. This plot location was established in 2004 and is resurveyed every five years by agency personnel and volunteers working with the GLORIA group. Panoramic featuring Mono Lake on the left, Mt. Dunderberg summit near the middle, and sections of the Hoover Wilderness from the center to the right. Forest Service photo by Tim Kellison.
Saw this reptile dashing through a grassy stretch at the Chinese Garden in Singapore. I was caught offguard and was a tad late in setting up my camera so I did not manage to shoot it at full length. Slow on the draw, tsk tsk.
Best viewed large.
