Excerpt from Key to Engines and Engine-Running: A Practical Treatise Upon the Management of Steam Engines and Boilers for the Use of Those Who Desire to Pass an Examination to Take Charge of an Engine or Boiler In the preparation of this book the aim has been to con fine its contents to matters pertaining to the engine room, and to so present each subject that the student could readily understand it without the aid of a teacher. The amount of Space alotted to each subject, and the method of treating it, has been determined from a considera tion not only out of its importance, but also of the difficulty that many are apt to encounter by reason of their education having been limited. In the parts teaching simple calculations especial pains have been taken to make each subject plain and clear, by the aid of engravings and of explanatory notes placed alongside of the calculations. This the author believes will be found to have an especial value to the class of readers for whom this book is intended. 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.

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