The standard electrical dictionary : a popular encyclopaedia of words and terms used in the practice of electrical engineering (1898)
Sloane, T. O'Conor (Thomas O'Conor), 1851-1940 · London : Crosby Lockwood and Son · leaf 235
material^, such as resin or gutta percha,which is held in a shallow metal-lined box or form. The disc maybe half an inch thick and a foot or more in diameter, or may bemuch smaller and thinner. A metal disc A, smaller in diameter isprovided with an insulating handle which may be of glass, or… … Fig. 159. Electrophorous. latter disc or cake projects on all sides. Owing to roughness thereis little real electric contact between the metal and dielectric. Ontouching the metal disc a quantity of negative electricity escapesto the earth. On raising it from the cake it comes off excited STANDARD…
Electricity
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