Elementary lessons in electricity & magnetism (1895)
Thompson, Silvanus P. (Silvanus Phillips), 1851-1916 · New York and London, Macmillan and co. · leaf 88
-MB Fig. 47. Fig. 4S. of opposite form attract one another. If a crystal bebroken up, each fragment is found to possess also ananalogous and an antilogous pole. Many other crystals beside the tourmaline are moreor less pyro-electric. Amongst these are silicate of zinc(electric calamine), boracite,…
Electricity
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