Al-Jazari publishes his Book of Ingenious Mechanical Devices
In 1206, engineer Ismail al-Jazari finished a manuscript at the Artuqid palace in Mardin describing 50 machines he had actually built — water clocks, fountains, and pumps. One twin-cylinder pump used a crankshaft, the same rotary-to-linear principle that later drove steam and combustion engines. A practical book, copied for centuries because people wanted to build things.








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