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

by American School of Correspondence

HORATIO A. FOSTER

Consulting Engineer; Member of American Institute of Electrical Engineers; Member
of American Society of Mechanical Engineers.
Author of "Electrical Engineer's Pocket-Book."

WILLIAM S. FRANKLIN, M.S., D.Sc.

Professor of Physics, Lehigh University.
Joint Author of "The Elements of Electrical Engineering," "The Elements of Alternating Currents."

LAMAR LYNDON, B.E., M.E.

Consulting Electrical Engineer; Associate Member of American Institute of Electrical
Engineers; Member, American Electro-Chemical Society.
Author of "Storage Battery Engineering."

ROBERT ANDREWS MILLIKAN, Ph.D.