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 664
Fig. 16. Diagram of Connections Fig. 17. Diagram showing properof Series Magneto Bell and Connections of Extension Bell. Telephone Set. Requirements of JfSetallic Circuits. — Metallic circuit telephonelines must fulfil the following conditions : — a. Both wires of the circuit must have…
Electrical engineering
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