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WMi CATALOGUE OF GOOD, PRACTICAL BOOKS HORSEPOWER CHART. Shows the horsepower of any stationary engine without calculation. No matter what the cylinder diameter of stroke, the steam pressure of cut-off, the revolutions, or whether condensing or non-condensing, it’s all there. Easy to use, accurate, and saves time and calculations. Especially useful to engineers and designers. 5 0 cents MODERN STEAM ENGINEERING IN THEORY AND PRACTICE. By Gardner D. Hiscox. This is a complete and practical work issued for Stationary Engineers and Firemen, dealing with the care and management of boilers, engines, pumps, superheated steam, refrigerating machinery, dynamos, motors, elevators, air compressors, and all other branches with which, the modern engineer must be familiar. Nearly 200 questions with their answers on steam and electrical engineering, likely to be asked by the Examin- ing Board, are included. Among the chapters are: Historical: steam and its properties; appliances for the generation of steam; types of boilers; chimney and its work; heat economy of the feed water; steam pumps and their work: incrustation and its work; steam above atmospheric pressure; flow of steam from nozzles; superheated steam and its work; adiabatic expansion of steam; indicator and its work; steam engine proportions; slide valve engines and valve motion; Corliss engine and its valve gear; compound engine and its theory; triple and multiple expansion engine; steam turbine; refrigeration; elevators and their management; cost of power; steam engine troubles; electric power and electric plants. 487 pages. 405 engravings. 3d Edition. . . . $3.00 STEAM ENGINE CATECHISM. By Robert Grimshaw. This unique volume of 413 pages is not only a catechism on the question and answer principle, but it contains formulas and worked-out answers for all the Steam problems that appertain to the operation and management of the Steam Engine. Illustrations of various valves and valve gear with their principles of operation are given. Thirty- four Tables that are indispensable to every engineer and fireman that wishes to be progressive and is ambitious to become master of his calling are within its pages. It is a most valuable instructor in the service of Steam Engineering. Leading engineers have recommended it as a valuable educator for the beginner as well as a reference book for the engineer. It is thoroughly indexed for every detail. Every essential question on the Steam Engine with its answer is contained in this valuable work. Sixteenth edition. Price...................................................$2.00 STEAM ENGINEER’S ARITHMETIC. By Colvin-Cheney. A practical pocket-book for the steam engineer. Shows how to work the problems of the engine room and shows “why.” Tells how to figure horsepower of engines and boilers; area of boilers; has tables of areas and circumferences; steam tables; has a dictionary of engineering terms. Puts you on to all of the little kinks in figuring what- ever there is to figure around a power plant. Tells you about the heat unit; absolute zero: adiabatic expansion; duty of engines; factor of safety; and a thousand and one other things; and everything is plain and simple—not the hardest way to figure, but the easiest. Second Edition....................................50 cents STEAM HEATING AND VENTILATION PRACTICAL STEAM, HOT-WATER HEATING AND VENTILATION. By A. G. King. This book is the standard and latest work published on the subject and has been pre- pared for the use of all engaged in the business of steam, hot-water heating, and ventila- tion. It is an original and exhaustive work. Tells how to get heating contracts, how to install heating and ventilating apparatus, the best business methods to be used, with “Tricks of the Trade” for shop use. Rules and data for estimating radiation and cost and such tables and information as make it an indispensable work for every- one interested in steam, hot-water heating, and. ventilation. It describes all the principal systems of steam, hot-water, vacuum, vapor, and vacuum-vapor heating, together with the new accelerated systems of hot-water circulation, including chapters on up-to-date methods of ventilation and the fan or blower system of heating and ventila- tion. Containing chapters on: I. Introduction. II. Heat. III. Evolution of artificial heating apparatus. IV. Boiler surface and settings. V. The chimney flue. VI. Pipe and fittings. VII. Valves, various kinds. VIII. Forms of radiating i surfaces. IX. Locating of radiating surfaces. X. Estimating radiation. XI. Steam-