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Central-Energy Telephone System

Started by MagnetoDave, January 09, 2019, 07:52:59 PM

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Central-Energy Telephone System
by H. S. Webb, M. S.

One Battery for Two or More Telephones–Line Signals and Ringing Apparatus at Exchange and at Subscribers' Stations

Science and Industry, April 1900, Vol. 5, No. 3, pp 158-161

This is a journal article; see the PDF of it attached below.