Electrical engineer's pocket-book: a hand-book of useful data for electricians and electrical engineers (1901)
Foster, Horatio A. (Horatio Alvah), 1858-1913 · New York, D. Van Nostrand co.; London, E.& F.N. Spon, ltd. · leaf 36
24 SYMBOLS, UNITS, INSTRUMENTS. fluence of a current, some method of damping must be employed. Onemethod is to attach a mica vane to the moving system, and allow it to swingin an inclosed chamber which contains air or oil. Sometimes the movingneedle is inclosed in a hollow made in a block of…
Electrical engineering
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