An elementary book on electricity and magnetism and their applications (1919)
Jackson, Dugald C. (Dugald Caleb), 1865-1951, Jackson, John Price, b. 1868, Black, Newton Henry, b. 1874 · New York, The Macmillian Co · leaf 599
link in the chain. The greatest gain has been made in the line itself. Tele-phone currents are alternating currents of great and varyingfrequencies, from 100 to 2000 per second being the usual range.In long-distance telephone lines (much longer than powerlines) the line losses consume most of the… … Fig. 387. — Diagram of circuits for telegraphingand telephoning simultaneously. • THE TELEPHONE 535
Electricity · Magnetism
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