Experiment conducted by British scientists Stephen Gray and Wehler demonstrating electrical conduction for the first time, on 2 July 1729. Illustration from "Les Merveilles de la science ou description populaire des inventions modernes" written by Louis Figuier and published in 1867 by Furne, Jouvet et Cie.

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Keywords: 18th, 19th, century, conductivity, development, drawing, electricity, engraving, experiment, france, french, illustration, invention, phenomenon, physics, progress, science, scientific, technical