Electricity for public schools and colleges (1891)
Larden, W. (Walter), b. 1855 or 6 · London : Longmans · leaf 194
ectroscope or electrometer indicates the A V dueto the contact of the zinc and copper alone, and shows that zinc is -I- tocopper. (ii.) An electroscope is provided with an upper condensing plate made ofzinc. This is, as usual, provided on its under surface with an insulating layerof lac varnish.… … Then a copper wire is made to connect the upper (unvarnished) surface ofthe zinc plate with the under surface of the copper plate. It is found that the zinc and copper have now assumed a A V in which thezinc is + to the copper. This AV is of course (j^f Chapter X.) magnified,and so rendered…
Electricity
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