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GUARANTEED. PATENTS SECURED OR FEE RETURNED.
Send model or sketch for free report as to Patentability. Send for finest publications ever issued for

free distribution "HOW TO OBTAIN A PATENT." with 100 MECHANICAL MOVEMENTS Illustrated and described, and “WHAT TO INVENT," containing valuable LIST OF INVENTIONS WANTED. ONE MIL

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PATENT WHAT INVENT!

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Cyclopedia of Engineering

Five volumes, 2,500 pages, fully indexed, size of page 7 x 10 inches, bound in three quarters red morocco leather. Over 2,000 full-page plates, diagrams, sections, tables, formulæ, etc. Written by the foremost authorities and especially prepared for Home Study, after a careful study of shop needs and conditions. Years of experience in shop, laboratory and class room required in its preparation. Each section tested by actual use for its practical value to the man who desires to know the latest and best practice in shop and engine room. Numerous explanatory examples. Complete sets of test questions and reviews in every volume, thus combining the best features of a text book and a reference work. It is easily understood by the man who has little time to acquire the fundamental principles of Engineering.

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