The story of electromagnetism / by Sir William Bragg.

  • William Henry Bragg
Date:
[1941]
Catalogue details

Licence: In copyright

Credit: The story of electromagnetism / by Sir William Bragg. Source: Wellcome Collection.

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    sisting of plates of zinc, silver and wads of cloth dipped in brine, arranged in regular order—zinc, silver, wad, zinc, silver, wad, and so on. By attaching wires to a zinc plate at one end of the pile and a silver plate at the other he could repeat Galvani’s observations with much greater effect. Fig. 2 shows the arrangement. A pile constructed Fig. 2. A drawing of a Volta pile, reproduced from an illus¬ tration on p. 262 of the collection of Volta’s papers published by the Italian Electrotechnical Association under the title cc L’opera di Alessandro Volta.” (Z=zinc; A=silver ; w=umida (damp)). by Volta and presented by him to Faraday is still preserved at the Royal Institution. Volta varied the construction by substituting glass cups contain¬ ing brine or weak acid for the wads of damp cloth ; the copper and zinc plates remained as before, but were now dipped into the cups. This was Volta’s
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