Modern electricity and magnetism, theoretically and practically considered (1885)
Avery, Elroy M[cKendree], 1844- [from old catalog] · New York and Chicago, Sheldon and company · leaf 73
right hand a sewing-needle with the tip of the forefinger cover-ing the end of the needle. Bring the right hand cautiously near thegold-leaf electroscope. Notice the divergence of the leaves. Nowuncover the point of the needle and bring it near the electroscope.Notice the marked and immediate…
Electricity · Magnetism
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