National Telegraphic Union · New York : N.T.U. · leaf 268
n large moistenedplates of metal, and indicating the currents upon a finewire galvanometer, we find that the same force thatwithout the interposition of the body would instantlydrive the needle to 90°, would, after passing the body,scarcely move it. Increasing the intensity power untilwe deflect… … highest, and also at intermediate conditions, and findthat, though the range of force in the battery is from 1to 250, yet the indications on the galvanometer are onlyfrom 27° degrees to 47°. The inference is unavoidable,that, though we employ great intensity, a very minutequantity power can be…
Telegraph
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