The practical telephone handbook and guide to the telephonic exchange (1906)
Poole, Joseph · New York, Macmillan Co. · leaf 90
Fig. 52.—Scale I Fig. 53.—Scale £ magnet (shown in Fig. 52) is now much used in the hand-micro-telephones employed extensively in this country. The Gower Receiver.—This instrument, shown in Figs. 53and 54, is an old form of receiver which is still somewhat ex-tensively used by the PostOffice and…
Telephone
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