Publisher's Synopsis
Excerpt from American Telephone Practice
That a third edition of this work should have been called for within three months after the appearance of the first is indeed gratifying. The time since the second edition was exhausted has been utilized in making many changes in the matter already presented, and in the preparation of much new matter, all of which it is thought will make the work more valuable as a guide and general reference-book in practical telephony.
The chapter on Automatic Exchanges has been written because the book seemed incomplete without it. If it is here. After criticised for containing no descriptions of practical appa ratus, my plea will be that it is mainly the fault of the subject.
That very important factor in modern telephony, the storage battery, was certainly very inadequately handled in the first edi tion. Chapter XXXV. Is intended to remedy this.
The last chapter, on Specifications, is given as a help rather than as an in?exible guide to those drawing specifications. The specifications given represent modern practice, but they are not meant to serve in the place of common sense or of engineering ability.
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