=HOW TO RUN ENGINES AND BOILERS.= By E. P. WATSON, (for many years a practical engineer, and a well-known writer in _The Engineer_.) A first-rate book for beginners, firemen and helpers. Commencing from the beginning, showing how to thoroughly overhaul a plant, foundations, lining up machinery, setting valves, vacuum, eccentrics, connection, bearings, fittings, cleaning boilers, water tube boilers, running a plant, and many useful rules, hints and other practical information; many thousands already sold. =160 pages, fully illustrated, cloth, $1.00.= =AMMONIA REFRIGERATION.= By I. I. REDWOOD. A practical work of reference for engineers and others employed in the management of ice and refrigerating machinery. A first-rate book, beginning from the bottom and going carefully through the various processes, stage by stage, with many tables and original illustrations. =Cloth, $1.00.= =MEYER SLIDE VALVE.= Position diagram of cylinder with cutoff at 1/8, 1/4, 3/8 and 1/2 stroke of piston with movable valves, on card 7-1/2 in. ◊ 5-1/2 in. =Price, 25c.= * * * * * AN ELEMENTARY TEXT-BOOK ON STEAM ENGINES AND BOILERS, FOR THE USE OF STUDENTS IN SCHOOLS AND COLLEGES. BY J. H. KINEALY. _Professor of Mechanical Engineering, Washington University._ Illustrated with Diagrams and Numerous Cuts, Showing American Types and Details of Engines and Boilers. This book is written solely as an elementary text-book for the use of beginners and students in engineering, but more specially for the students in the various universities and colleges in this country. No attempt has been made to tell everything about any one particular subject, but the author has endeavored to give the student an idea of elementary thermodynamics, of the action of the steam in the cylinder of the engine, of the motion of the steam valve, of the differences between the various types of engines and boilers, of the generation of heat by combustion, and the conversion of water into steam. Care has been taken not to touch upon the design and proportion of the various parts of engines and boilers for strength; as, in the opinion of the writer, that should come after a general knowledge of the engine and boiler has been obtained. In the derivation of some of the formulÊ in thermodynamics, it has been necessary to use the calculus, but the use of all mathematics higher than algebra and geometry has been avoided as much as possible. An earnest endeavor has been made to present the subject in a clear and concise manner, using as few words as possible and avoiding all padding. CONTENTS OF CHAPTERS.