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 42
Fig. 23. … Figs. 24 and 25. Queen Standard Condensers. As the farad is far larger than ever is met in practice, the practical unitis taken as one-millionth farad or the micro-farad. The commercial standard most in use is the \ micro-farad, althoughadjustable condensers are often used, arranged so as to…
Electrical engineering
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