German deacon Ewald Georg von Kleist and Dutchman Pieter van Musschenbroek Independently discovered the Leiden jar, a source of electrical charge.
William Payne’s An Introduction to the Game of Draughts becomes the first guide to the ancient game of checkers or draughts.
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.
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.
Claude Chappe invents a semaphore line, a method of communicating over long distances.