Cyclopedia of Telephony and Telegraphy
Reading edition
A General Reference Work on
TELEPHONY, SUBSTATIONS, PARTY LINE SYSTEMS, PROTECTION, MANUAL SWITCHBOARDS, AUTOMATIC SYSTEMS, POWER PLANTS, SPECIAL SERVICE FEATURES, CONSTRUCTION, ENGINEERING, OPERATION, MAINTENANCE, TELEGRAPHY, WIRELESS TELEGRAPHY AND TELEPHONY, ETC.
Prepared by a Corps of
TELEPHONE AND TELEGRAPH EXPERTS, AND ELECTRICAL ENGINEERS OF THE HIGHEST PROFESSIONAL STANDING
Illustrated with over Two Thousand Engravings
F O U R V O L U M E S
CHICAGO AMERICAN SCHOOL OF CORRESPONDENCE 1919
COPYRIGHT, 1911, 1912, BY AMERICAN SCHOOL OF CORRESPONDENCE COPYRIGHT, 1911, 1912 BY AMERICAN TECHNICAL SOCIETY Entered at Stationers' Hall, London All Rights Reserved
ToC