The King of all. The Companion volume to Modern Wiring Diagrams JUST FROM THE PRESS ELECTRICAL WIRING and CONSTRUCTION TABLES By HENRY C. HORSTMANN and VICTOR H. TOUSLEY PRICE, NET, $1.50 THIS BOOK CONTAnt calculations. Trents required wand by a ver Tables for direct current calculations. Tables for alternating curront calculations. These tables show at a glance the currents required with any of the systems in general use, for any voltage, efficiency, or power-factor, and by a very simple cal. culation (which can be mentally made) also the proper wire for any loss. Tables showing the smallest wire permissible with any system or number of H. P. or lights under National Electrical Code." Very convenient for Contractors. Tables for calculating the most economical loss. Tables and diagrams showing the proper size of conduits to accommodate all neces sary combinations or numbers of wires. Tables and data for estimating at a glance the quantity of material required in different lines of work. As this is intended for a pocket hand-book everything that would make it un. necessarily cumbersome has been omitted. There is no padding. Every page 18 valuable and a time saver. This book can be used every day by the wire-man, the con. tractor, engineer and architect. All parts are so simple that very little knowledge 18 required to understand them. OTHER IMPORTANT WORKS BY THESE AUTHORS Modern Wiring Diagrams & Descriptions, price - $1.50 Modern Electrical Constructions, price - $1.50 The 3 above volumes in a box. Special price complete, • $4.00 OUR GUARANTEE If any of these books are not worth ten times the amount asked, return them and get your money back. Sent all charges prepaid to any address upon receipt of price. Our 1907 Catalogue now ready. Sent free. FREDERICK J. DRAKE & CO., Publishers, 350-352 Wabash Ave., CHICAGO, U. S. A. In ordering please mention this paper ITS METALLURGY AND MECHANICAL TREATMENT By Harbord and Hall, in the Metallurgical Series Edited by W. Roberts-Austen $; $9.00 Containing 758 pages, 37 folding plates, 100 microsec- & Net of the various branches of steel manufacture, both J. B. LIPPINCOTT COMPANY, Publishers, PHILADELPHIA Mention Technical World Magazine 50 Cents Reference Library Secures this GREAT Reference Library This magnificent work-costing $750,000 to produce-is a Dictionary and an Encyclopedia combined. In fullness of definitions, number of words defined and accuracy, it is superior to reference works selling for five times its price. We have obtained a limited number of sets which we will close out at half price on the easy monthly-payment plan. We send the complete work to your home for examination, without charge, and if you decide to keep it a first payment of 50 cents . secures a set-to be paid for while you are using it. $5.00 Atlas FREE If you mail the coupon below at once we will give you, absolutely free of charge, a splendidly bound 1906 Atlas of the World. "This Modern Atlas'' is 10x13 inches in size and contains 100 maps in six to twelve colors. It gives separate maps of all states and territories and all countries of the world. It was printed in the fall of 1906 and is thoroughly up-todate. Its price is $5.00, but if you reply promptly you can have it free. Five Massive Volumes The set contains 5,000 pages, 250,000 words, 3,000 illustrations, and 50,000 encyclopedic articles. There are three styles of bindingfull sheep, half-leather, and fine library cloth. We recommend the half-leather for ordinary use, and the full sheep for those who desire a set bound in luxurious style. In printing, paper, illustrations, and binding, this work is so nearly perfect that it is worthy of a place in the library of the most fastidious book-lover. Greatest Dictionary Bargain Ever Offered As a Dictionary this work defines 25,000 more words than any other Dictionary and every definition is so clear a school boy can understand it. As an Encyclopedia it treats 50,000 subjects in an encyclopedic manner and this vast array of articles covers the whole field of human knowledge. MAIL THIS COUPON......... Free for Examination The limited edition that we control will be closed out to prompt purchasers at slightly more than one-third the publishers' price.' For instance, the half-morocco binding-our price $20.50—has been widely sold at $56.00 a set, and it is considered by expert judges to be worth the money. Prompt action on your part is necessary to be sure of a set on these terms. Cut out the coupon and mail it to us at once. We will send you a complete set at OUR expense, to be returned if not satisfactory. Remember, if your order is received at once, you will get the Atlas free. Payments are 50 cents upon acceptance of the books, and $1.25, $1.50 or $2.00 a month thereafter, depending upon the style of binding desired. AMERICAN NEWSPAPER ASSOCIATION, New York: You may send me for inspection one set of the NEW AMERICAN ENCYCLOPEDIC DICTIONARY, bound in the style indicated by having the “X” beside. Full Sheep Binding. Regular price $64.00. I will pay for the same, if I decide to keep the books, as follows: 50 cents after I examine them and $2.00 a month until your special price of $25.00 is paid. Hall Leather Binding. Regular price $56.00. I will pay for the same, if I decide to keep the books, as follows: 50 cents after I examine them and $1.50 a month until your special price of $20.50 1s paid. Library Cloth Binding. Regular price 842.00. I will pay for the same, if I decide to keep the books, as follows: 50 cents after I examine them and 81.25 a month until your special price of $16.50 is paid. It is understood thatyou will send me with the set, free, an Atlas of the World. You prepay delivery charges. If I decide not to keep the books, I am to return them to you, charges collect, together with the Atlas. Name........ American Newspaper Association 44-60 East 23rd Street, - :: New York, N. Y. Address ... State .... Mention Technical World Magazine The enefit at densed, aperience we offer yoly IF there were a great University of Business, with a Rockefeller at its head; a Hill, a Harriman, a 1 Morgan, a Vanderbilt and a Gould on its faculty, it could scarcely teach you more of the practical methods of making money than the six-volume Business Man's Library described below. 1263 pages crammed full of actual working, business plans, methods, pointers. Not theories, or advice, or mere suggestions—but experience, dearly-bought, hard-earned experience. Placed, now, within the easy grasp of any business man, great or small, employer or employee, at a cost of only six cents a day. · The Business Man's Library is, in reality. a complete cor: | Bros., Carson. Pirie. Scott & Co., American Radiator Co., respondence course under the great Master-Minds of Business, Jones Dry Goods Co., Burroughs Bros. Co., International Seventy-eight men-not mere writers, but National Business Harvester Co., International Time Recorder Co., Andrews Men, whose very names inspire respect and Heating Co., Morgan & Wright (3 sets), Uni VITAL SUBJECTS admiration and confidence-are its authors. versity of Michigan (to be used as text books on These seventy-eight men give us not only the Ranking business), University of Wisconsin (purchased intimate secrets of their own successes, but Accounting by two instructors in commercial subjects). priceless business information, working plans, Cost Systems What the blue-print is to the iron-worker: methods, statistics, Omce Syster, tabulations, systems, Credit Systems what the compass is to the mariner; what the hints, pointers, from high places in the world Omee Short Cuts map is to the traveler: what the experiment of money where few are permitted to enter, Sales Management station is to the farmer-all this, and more, In no other way can you get the valuable in. Insurance Systems the Business Man's Library is to the Business formation which the Business Man's Library Follow Up Systems Man. And add to this helpful Library the will give you, save through the slow and costly Real Estate Systems help you will get from SYSTEM, the preschool of experience. For what we offer you Financing a Business eminent monthly magazine of business! 260 here is solid business experience, collected, Collecting Dead Aceounts to 356 pages every month. and you cannot classified, condensed and crystallized for Training and Developing Men afford to miss a single page of it. SYSTEM your benefit at a cost of thousands of dollars. Managing a Wholesale House will show you how to start a new business, how The six uniform volumes of the Business How to Become an Executive to win trade for it, establish prestige, create Man's Library are published in a handsome Business Letter Writing profits, minimize wastes, keep down expenses. de luxe edition. Beautiful. clear, large type: Scientide Salesmanship stop losses. Better, SYSTEM will show you fine hand-made egg-shell book paper: one Organizing a Factory how to accomplish more, make more in your edge of gold, two edges roughed; half Eng. Handling Employees present daily work. Each issue contains lish Morocco binding-these are, indeed, a set Store Management special "inside” information on buying, sellof books for the library or desk of which to be Training Salesmen ing accounting, manufacturing. shipping. proud. Window Dressing collecting, advertising. business letter writing, A Few Recent Purchasers : U.S. Govern. Selling by Mail banking, business management, handling Buying Systems ment (3 sets), Sears, Roebuck & Co. (2 sets), Retail Systems men, trade-getting ideas. circularizing, and N.K. Fairbank Co., Illinois Steel Co., Armour Advertising everything in which a man in business, big or & Co.. National Cash Register Co., American Retailing little, is interested. SYSTEM has 300.000 reg. Graphophone Co., Marshall Field & Co., U.S. ular readers. It has helped many of them to Steel Company. City Nat'l Bank of New York, better salaries, bigger profits that would have Sherwin-Williams Co., Montgomery Ward & Co., Hib. | been impossible, undreamed of, without SYSTEM-Won't bard, Spencer, Bartlett & Co., John Wanamaker, Butler | you let SYSTEM help you? JOHN FARSON "This library is a short cut to more | BARNHART BROS. & SPINDLER “We circulated salary and more business, to more these books knowledge and more power. Worth a decade of experience.” among our employees and sent copies to our branch houses." PENN CHOCOLATE CO. This library is better than V "I don't care bow smart or bright or • its name-void of generali clever a man is, be can learn a great ties and practical beyond expectations. Taught us a lot," deal from these books. I will never part with my set." ALFRED DOLGE “I wish the work could be brought be. CHARLES E. HIRES "I regard it as of benefit and fore every man who wants to build assistance to any wide-awake a real business career.' business man, no matter who." Picture in your mind six handsome gold-topped volumes, the same binding. paper, type that are usually to be found only in limited editions, 1.263 pages that could scarcely be worth more to you if each leaf were a $10 bill; and twelve months of SYSTEM-more than 3.000 pages of current business nce and help, convertible into ready cash-and then think of this offer: Only $18. spread out thin over ni they are yours forever. Your check or money order for $2, or a $2 bill sent today, will bring the books tomorrow and enter your name as a regular yearly SYSTEM subscriber, $2 now and $2 a month until $18 is paid. Less than you probably spend for daily papers; less surely, than it costs you for carfare or the evening smoke. Long before this week is out these helpful books, if ordered now, will have a chance to put back in your pocket more than their cost. Is the offer clear? Simply say “I accept your offer in Feb. Tech. World," and send $2. Mention Technical World Magazine |