Diagram showing the protective action radius of the lightning rod developed by Mr Perrot. 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: 19th, architecture, building, century, conductor, construction, development, drawing, engraving, france, french, illustration, invention, label, lightning, progress, protection, scientific, technical