"Telephone" Article - Table of Contents
Part 1. Telephone - Introduction
IB. HISTORY OF THE TELEPHONE
Part 2. History of the Telephone
II. TELEPHONIC INSTRUMENTS
Part 3. Telephonic Instruments
Part 4. Telephonic Circuits
Part 5. The Working of Telephone Circuits
The above article was written by Thomas Gray, B.Sc., F.R.S.E.; Glasgow.
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