Copyright 1923 By ROBERT GRIMSHAW Also Copyrighted 1908 and 1911 Copyrighted 1898 By NORMAN W. HENLEY & CO. Copyrighted 1896 and 1893 PRINTED IN THE U. S. A. Composition and Presswork The catechetical or question-and-answer form is chosen because enabling the inquirer on any given topic to find and use at once the desired information; leaving it to more leisure time to study carefully all the underlying and correlated principles. While the four thousand or so questions which this edition contains do not cover the entire ground of inquiry in this line, they at least embrace the most important and up to date. They have been contributed both by novices and by experts and suggested by myself as one considered competent to know what engineers and firemen are likely to ask, and should ask, themselves or others, in the course of their daily work. Some are taken bodily from examination papers given to candidates for appointment or promotion. In the present edition especial attention is paid to certain branches more recently brought to the enginerunner's and the fireman's notice-for instance, the unaflow engine, the improved superheater, the latest design of power brake, and the electric locomotive; while the chapter on accidents has been greatly enlarged and improved; and the man on the foot board has been initiated more fully than before into the entertaining and practically valuable mysteries of valus diagrams, traction curves and motion studies. I hope that this edition will prove, as the many others have that preceded it, of daily use to thousands of those who tame and train and drive "the iron horse." ROBERT GRIMSHAW New York, June, 1923. |