Wright, Mark R., 1854- · London : Longmans · leaf 181
d doesnot attract light bodies; itis an insulator. Fasten a thin iron wire tothe wood or metal rod in-serted in a glass tube (fig.168); attach a metal ball tothe end, place underneaththe ball pieces of paper, andexcite the glass rod; thepieces of paper are attracted.A similar result is obtainedwith… … Attraction and Repulsion 173 is a conductor. The air is evidently an insulator, or we shouldbe unable to retain electrification on the apparatus used. Take a fine copper wire, a fine iron wire, and threads of silkand cotton, each about five yards long. Fasten one end of thecopper wire to the disc…
Physics
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