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 142
with No. 18to 24 A. W. G. wire to a resistance of yi ohm; the secondary,with No. 36 wire to a resistance of 80 ohms. The Edison tele-phone induction coil was wound with similar wires to a resistanceof 3 to 4 ohms and of 250 ohms respectively. Coil, Magnetizing. A coil of insulated wire for making… … Magnetizing Coil. may be quite heavy, 2 or 3 millimeters (.08—.12 inch) thick, and iscemented together with carpenters glue, or with shellac or etherealsolution of gum copal. In use it is passed over the bar a few timeswhile a heavy current is going through it. It is used for magiccircles also.…
Electricity
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