Principles of telephony, properties of telephone circuits, telephone receivers, telephone transmitters, telephone apparatus, magneto-generators and bells, circuits of telephone instruments, telephone instruments, installation of telephones, line disturbances and transpositions, long-distance telephony, magneto-switchboards, large magneto-switchboards, telephone-switchboard apparatus., by International Correspondence Schools

Title:	Principles of telephony, properties of telephone circuits, telephone receivers, telephone transmitters, telephone apparatus, magneto-generators and bells, circuits of telephone instruments, telephone instruments, installation of telephones, line disturbances and transpositions, long-distance telephony, magneto-switchboards, large magneto-switchboards, telephone-switchboard apparatus.
Author:	International Correspondence Schools
Note:	International Textbook Company, 1907

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