Stationary stationery
Paper is a Chinese Han dynasty invention from before Christ the west previously used papyrus of various grades for normal use and vellum for recording important documents.
Pencils with a wooden casing are an Italian invention from the 1560's prior to that people used square sticks of very valuable graphite imported from Cumbria in England from a closely guarded mine the only known deposit of pure graphite.
The Germans and French both worked out methods to make artificial pencils using graphite mixed with clay though initially it was not as good a product as the English pure graphite pencils.
Rulers are an ancient tool with the Indus valley Mohenjo-Daro ruler being divided into units corresponding to 1.32 inches (33.5 mm) and these are marked out in decimal subdivisions with amazing accuracy, to within 0.005 inches (0.13 mm). Ancient bricks found throughout the region have dimensions that correspond to these units.
c (Whitelaw)
Whitelaw, Ian (2007). A Measure of All Things: The Story of Man and Measurement.
Macro Mondays Stationery Micro Nikkor 55mm f2.8 at f22 P9020265
OLYMPUS DIGITAL CAMERA
Stationary stationery
Paper is a Chinese Han dynasty invention from before Christ the west previously used papyrus of various grades for normal use and vellum for recording important documents.
Pencils with a wooden casing are an Italian invention from the 1560's prior to that people used square sticks of very valuable graphite imported from Cumbria in England from a closely guarded mine the only known deposit of pure graphite.
The Germans and French both worked out methods to make artificial pencils using graphite mixed with clay though initially it was not as good a product as the English pure graphite pencils.
Rulers are an ancient tool with the Indus valley Mohenjo-Daro ruler being divided into units corresponding to 1.32 inches (33.5 mm) and these are marked out in decimal subdivisions with amazing accuracy, to within 0.005 inches (0.13 mm). Ancient bricks found throughout the region have dimensions that correspond to these units.
c (Whitelaw)
Whitelaw, Ian (2007). A Measure of All Things: The Story of Man and Measurement.
Macro Mondays Stationery Micro Nikkor 55mm f2.8 at f22 P9020265
OLYMPUS DIGITAL CAMERA