Excerpt from Cyclopedia of Engineering: A General Reference Work on Steam Boilers and Pumps; Steam Stationary, Locomotive, and Marine Engines; Steam Turbines; Gas and Oil Engines; Gas Producers; Compressed Air; Refrigeration; Elevators; Heating and Ventilation For page numbers. See foot of pages. For professional standing of authors, see list of Authors and Collaborators at front of volume. 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.