Excerpt from American Tool Making and Interchangeable Manufacturing: A Treatise Upon the Designing, Constructing, Use, and Installation of Tools, Jigs, Fixtures, Devices, Special Appliances, Sheet-Metal Working Processes, Automatic Mechanisms, and Labor-Saving Contrivances; Together With Their Use in the Lathe, Milling Mac I. To give accurate and concise descriptions of the funda mental principles, methods, and processes by which the greatest accuracy and highest efficiency may be attained in the produc tion of repetition parts of metal at the minimum of cost. II. To discuss and illustrate the great numbers of special tools, their construction and use, as fully as possible within the narrow limits of a single volume. III. To avoid all that is speculative, impracticable, and oh solete in processes, methods, principles, design, and construction. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.