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THERE are XIX chapters of subjects, carrying you from the fundamental principles of electricity on through the various branches to a point where the careful student comprehends the complete designing, care and operation of a dynamo or motor. Each Bubject is carefully written and to the point. After a student studies a subject, he is questioned on that subject in such a manner as to bring clearly to his mind the points he needs to know regarding same. A DICTIONARY in back of book will enable him to learn the meaning of any electrical word, term or phrase used in this book, as well as hundreds of others in common use. All required tables necessary in the study are in it.


$2.00 per Copy—Third Edition—11,000 Copies Sold The offer we make of refunding money if book Is

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One in connection with the sale of a book. But we have no fear of its return. Your decision will be what thousands of others have been. Money would not buy it if it could not be duplicated. We could print testimonials by the hundreds. It is best to order and be your own judge of its merits.


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Civil, Mechanical, Electrical
and Chemical Engineering

New Laboratories and Excellent Equipment. Beautiful site within four miles of Boston. Preparatory Department for students who have had engineering practice, but insufficient preparation for college work.

For information concerning courses and positions of graduates, address

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t^jc*l examinations provided lor. Send for a Catalogue.


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mtnd for operator* in the history of the telegraph. Our Institution established 1874, and endorsed by offlrials of


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If you do not own a complete aetoi Shakespeare, or if you own one that is not thoroughly upto-date and satisfactory, we will send you on request ten beautiful pictures of Shakespeare's heroines. These picture are printed in colors on heavy plate paper, and bear no printing. They are most appropriate for framing or decorative purposes. Tbo regular price of the collection at art stores is $3.00. We make this offer to enable us to send you information about our new edition of Shakespeare, the best ever published at a moderate price. In writing enclose 10c. (silver or stamps) to pay postage and wrapping; refunded if you are not satisfied. Address Dept. S. THE UNIVERSITY BOCrETT, 17 Flfla Areas©, Hew York

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CThis is what one customer has to say about the Dies we send out with our Pipe Cutting and Threading Machines:

II We bought our machines
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Bignall $ Keller Mfg. Co.

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JBratotng Jftatertais

Surveying Instruments

Liberal Discounts to Students


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of Correspondence. Ten years' experience with common slide-valve Corliss engines, air compressors, and boilers, water-tube and tubular. Best of references. Address The Technical World, No. 291.

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Wanted—Position as Electrical Apprentice. Three years spent in experimenting. Have built D. C. dynamo and motor. Good references. Address The Technical World, No. 299.

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