France Had Long Distance Calls in 1792

1745

German deacon Ewald Georg von Kleist and Dutchman Pieter van Musschenbroek Independently discovered the Leiden jar, a source of electrical charge.

1756

William Payne’s An Introduction to the Game of Draughts becomes the first guide to the ancient game of checkers or draughts.

1774

Philipp Matthäus Hahn was a German pastor, astronomer, and inventor, and he designed one of the earliest mechanical calculators, of which two are known to have survived to the present day.

1783

French physicist Charles-Augustin de Coulomb formulated Coulomb’s law. Coulomb’s law quantifies the amount of force between two stationary, electrically charged particles. The electric force between charged bodies at rest is conventionally called electrostatic force.

1792

Claude Chappe invents a semaphore line, a method of communicating over long distances.

441px-Chappe_semaphore
One of Claude Chappe’s Telegraph Towers – Public Domain

 

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