Excerpt from The Steam Consumption of Locomotive Engines From the Indicator Diagrams The use of steam for auxiliaries such as the air pump, the train heating system, blower, electric train - lighting sets, and also the loss of steam or water through the safety valves, blow - off valves, and boiler leaks render impossible the determination of the actual steam consumed per unit of power developed by the engines, since from to possibly 15% or 20% of the steam generated is used by the auxiliaries, or is lost. It is thus practically impossible under ordinary conditions to measure the actual steam consumption of the engines. 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.