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A DICTIONARY OF ELECTRICAL WORDS, TERMS AND PHRASES. BY EDWIN J. HOl|,STON, A.M., PROFESSOR OF NATURAL PHILOSOPHY AND PHYSICAL GEOGRAPHY IN THE CENTRAL HIGH SCHOOL OF PHILADELPHIA PROFESSOR OF PHYSICS IV THE FRANKLIN INSTITUTE OF PENNSYLVANIA ELECTRICIAN OF THE INTERNATIONAL ELECTRICAL EXHIBITION, ; ; ETC., ETC. SECOND EDITION. RE WRITTEN AND GREA TL Y ENLARGED. NEW THE W. J. YORKv: JOHNSTON COMPANY, 167-176 TIMES BUILDING. 1892; stri LIMITED, COPYRIGHT, 1889 AND 1892, BY THE W. J. JOHNSTON COMPANY, LIMITED. PREFACE TO THE FIRST EDITION. rapid growth of electrical science, and the almost daily addition to it of new terms and phrases, coined, as they too frequently are, in ignorance of THEwords, those already existing, have led to the production of an electrical vocabulary that is This multiplicity of words is extremely discouragalready bewildering in its extent. ing to the student, and acts as a serious obstacle to a general dissemination of elecfor the following reasons Because, in general, these new terms are not to be found eve-, in the unabridged editions of dictionaries. trical knowledge, : 1. The books 2. or magazines, in which they were cessible to the ordinary reader, or, if accessible, proposed, are either inac- first are often written in phraseology un- intelligible except to the expert. The same terms are used by different writers in conflicting The same terms are used with entirely different meanings. 3. 4. senses. Nearly all the explanations in the technical dictionaries are extremely brief as 5. regards the words, terms and phrase