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Excerpt from Cyclopedia of Mechanical Engineering, Vol. 7 of 7: A General Reference Work on Machine Shop Practice, Tool Making, Forging, Pattern Making, Foundry Work, Metallurgy, Steam Boilers and Engines Associate Member of the Institution of Mechanical Engineers. Author (if Pattern Making. Hoisting Machinery. Tools for Engineers and Woodworkers. Engineers' Turning. Etc. 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.