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The lever was also used in the shadoof water-lifting device, the first crane machine, which appeared in Mesopotamia circa 3000 BC, [4] and then in ancient Egyptian technology circa 2000 BC. [6] The earliest evidence of pulleys date back to Mesopotamia in the early 2nd millennium BC, [7] and ancient Egypt during the Twelfth Dynasty (1991-1802 BC ...
The automation of machine tool control began in the 19th century with cams that "played" a machine tool in the way that cams had long been playing musical boxes or operating elaborate cuckoo clocks. Thomas Blanchard built his gun-copying lathes (1820s–30s), and the work of people such as Christopher Miner Spencer developed the turret lathe ...
The lever was also used in the shadoof water-lifting device, the first crane machine, which appeared in Mesopotamia circa 3000 BC, [6] and then in ancient Egyptian technology circa 2000 BC. [8] The earliest evidence of pulleys date back to Mesopotamia in the early 2nd millennium BC, [9] and ancient Egypt during the Twelfth Dynasty (1991-1802 BC ...
The Machine Age [1] [2] [3] is an era that includes the early-to-mid 20th century, sometimes also including the late 19th century. An approximate dating would be about 1880 to 1945. An approximate dating would be about 1880 to 1945.
Humans developed agriculture around 12000 years ago. By storing grain, huge numbers of rodents flourished. Cats showed up to eat the rodents, and humans learned that if they took care of the cats ...
Take a look at various things from 20-30 years ago that have aged over time to become full-on luxuries in the eyes of various Redditors.
Genetic evidence from body lice suggests a range of dates centering over 100 thousand years ago. [28] The first bone scrapers appropriate for scraping hides to make supple leather were found in Morocco dating to 90–120,000 years ago. [29] [30] 164 kya – 47 kya: Heat treating of stone blades in South Africa. [31]
Twenty years ago, a Wilmington institution bit the dust. Less than a month after holding a farewell shindig in late March of 2004, the old IceHouse bar and music venue at 115 S. Water St. — a ...