A manual of electricity, magnetism and meteorology (1844)
Lardner, Dionysius, 1793-1859, Walker, Charles Vincent, 1812-1882 · London Longman, Brown, Green & Longmans · leaf 64
CHAP. XI. CONDENSING ELECTROSCOPES. 27 Fig. 15. … indications, and expose the observer to error. The plates of the condenser in someexperiments may be exposedto chemical action, which, as |s~ will be hereafter explained, N^ ^--J;— Tnl is attended with a greater or less evolution of electricity.In such cases, discs of cop-per gilt are preferable…
Atmospheric electricity · Electricity -- Early works to 1850 · Magnetism
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