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Text-book on static electricity (1904)

Mason, Hobart · New York,: McGraw Pub. Co. · leaf 137

An illustration from Text-book on static electricity, 1904, leaf 137
ld causeenough difference to enable the machine to start. 49. The Holtz Machine.— This machine, which is per-haps the best known of the influence machines, consists ofa fixed plate and a revolving plate as shown in Fig. 60.The former is slightly the larger in diameter and is piercedby three holes,…

Electronics · Electricity

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