Author Topic: Central-Energy Telephone System  (Read 201 times)

Offline MagnetoDave

  • *
  • Posts: 21
Central-Energy Telephone System
« on: January 09, 2019, 07:52:59 PM »
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.