Computing Events of the 1700s


  • Henry Mill patented the first writing device in London, England. The device was similar to a typewriter.


henry mill
Reference index of patents of invention, from 1617 to 1852, by B. Woodcroft London England



  • Johann Heinrich Schulze creates a mixture of chalk, silver nitrate and nitric acid to produce a substance that turns dark when exposed to sunlight. The first step toward photography.


  • English scientist Stephen Gray made the distinction between insulators and conductors.


  • Claude Chappe invents the semaphore line, a method of communicating over long distances that operated in France from 1793 to 1846.
Semaphore line tower in 18-century France

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