We Have The facilities and skill to give you printing that will aid you in placing your merchandise before people who, in buying, discriminate in favor of the best. W. P. Dunn Company 167 Adams Street :: Chicago We print The Technical World and Judicious Advertising Mention The Technical World. Our 1904 Catalog Now ready for distribution; it is the largest strictly Electrical Supply Catalog ever published. An Encyclopedia of Electrical Supplies of standard material as used in mines, factories, power stations and telephone exchanges. By obtaining this catalog you place your name on our mailing list for future publications and printed matter. To engineers interested in telephone construction work, we will mail our estimate sheet giving detail list of material required to build an exchange. NAGEL THE W. G. NAGEL ELECTRIC CO. Manufacturers and Jobbers Electric Supplies 520 Adams Street NAGEL ELECTRIC TOLEDO Toledo, Ohio Mention The Technical World. SELF-INSTRUCTING PRACTICAL BOOKS BOOKS The only complete work ever issued on the Art of American Tool Making and System of Interchangeable Manufacturing as carried on to-day in the United States. In it are described and illustrated all of the different types and classes of small Tools, Fixtures, Devices and Special Appliances which are in general use in all machine manufacturing and metal working establishments where economy, capacity and interchangeability in the production of machined metal parts are imperative. This book should be in the hands of every practical man. It is written by an American Tool Maker, and illustrated in a manner never before attempted, giving the 20th century manufacturing methods and assisting in reducing the expense and increasing the output and the income. 400 pages, 600 illustrations. Dies Their For the Modern Working of By JOSEPH V. WOODWORTH, M. E. A new work by a practical man for all Dies, press fixtures, and devices, from the simplest to the most intricate in modern use, are shown, and their construction and use described in a clear, practical manner, so that all grades of metal working mechanics can understand thoroughly how to design, construct and use them, for the production of the endless variety of sheet metal articles now in daily use. 4th edition, 384 pages, 505 illustrations. PRACTICAL FOR PRACTICAL MEN A Special Detailed Circular of these Books will be sent to any one in any part of the world on application. FREE. -Our 114-Page Catalogue of Practical Books. Sent free on request. Any of these books sent prepaid on receipt of price. THE NORMAN W. HENLEY PUBLISHING COMPANY 134 NASSAU STREET, NEW YORK, U. S. A. Mention The Technical World. THE TECHNICAL WORLD is a monthly magazine, published the fifteenth of each month, devoted to the problems of the technical and industrial world, and a treatment of all matters of interest in Applied Science. PRICE: The subscription price is $2.00 per year, payable in advance; single copies, 20 cents. HOW TO REMIT: Subscriptions should be sent by draft on Chicago, express order, or Post Office money order. PUBLISHED BY THE TECHNICAL WORLD CO. GLEN C. SHEFFER CHI. Entered at the Post Office, Chicago, Ill., as second-class mail matter. |