Cyclopedia of Telephony and Telegraphy, Vol. 1 / A General Reference Work on Telephony, etc. etc.

by American School of Correspondence

Head, Department of Electrical Engineering, University of Michigan

CHARLES THOM

Chief of Quadruplex Department, Western Union Main Office, New York City

ROBERT ANDREWS MILLIKAN, Ph.D.

Associate Professor of Physics, University of Chicago
Member, Executive Council, American Physical Society

SAMUEL G. McMEEN

Consulting Engineer and Telephone Expert
Of the Firm of McMeen and Miller, Electrical Engineers and Patent Experts, Chicago
American Institute of Electrical Engineers
Western Society of Engineers