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 ■I CATALOGUE OF GOOD, PRACTICAL BOOKS MODERN SUBMARINE CHART —WITH 200 PARTS NUMBERED AND NAMED. A cross-section view, showing clearly and distinctly all the interior of a Submarine of the latest type. You get more information from this chart, about the construction and operation oi a Submarine, than in any other way. No details omitted—everything is accurate and to scale. It is absolutely correct in every detail, having been approved by .Naval Engineers. All the machinery and devices fitted in a modern Submarine Boat are shown, and to make the engraving more readily understood, all the features are shown in operative form, with Officers and Men in the act of performing the duties This chart is really an encyclo- pedia OF A SUBMARINE....................................25 cents BOX CAR CHART. A chart showing the anatomy of a box'car, having every part of the car numbered and its proper name given in a reference list...............25 cents GONDOLA CAR CHART. A chart showing the anatomy of a gondola car, having every part of the car numbered ana its proper reference name given in a reference list.25 cents PASSENGER-CAR CHART. A chart showing the anatomy of a passenger-car, having every part of the car numbered and its proper name given in a reference list...........25 cents STEEL HOPPER BOTTOM COAL CAR. A chart showing the anatomy of a steel Hopper Bottom Coal Car, having every part of the car numbered and its proper name given in a reference list.25 cents TRACTIVE POWER CHART. A chart whereby you can find the tractive power or drawbar pull of any locomotive without making a figure. Shows what cylinders are equal, how driving wheels and steam pressure affect the power. What sized, engine you need to exert a given drawbar pull or anything you desire in this line...........................50 cents HORSE-POWER CHART Shows the horse-power of any stationary engine without calculation. No matter what the cylinder diamctor of stroke, the steam pressure of cut-off, tho 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. 50 cents TOILER ROOM CHART. By Geo. L. Fowler. A chart—size 14x28 inches—showing in isometric perspective the mechanisms be- longing in a modern boiler room. The various parts are shown broken or removed so that the internal construction is fully illustrated. Each part is given a reference number, and these, with the corresponding name, are given in a glossary printed at the sides. This chart is really a dictionary of the boiler room—the names of more than 200 parts being given..............................................25 cents COMPRESSED AIR COMPRESSED AIR IN ALL ITS APPLICATIONS. By Gardner D. Hiscox. This is the most complete book on the subject of Air that has ever been issued and its thirty-five chapters include about every phase of the subject one can think of. It may be called an encyclopedia of compressed air. It is written by an expert, who in its 665 pages, has dealt with the subject in a comprehensive manner, no phase of it being omitted. Includes the physical properties of air from a vacuum to its highest pressure, its thermodynamics, compression, transmission and uses as a motive power in the Operation of Stationary and Portable Machinery, in Mining, Air Tools, Air Lifts, Pumping of Water, Acids, ancj Oils; the Air Blast for Cleaning and Painting, the and its Work, and the Numerous Appliances in which. Compressed Air is a Most Convenient and Economical Transmitter of Power for Mechanical Work, Railway Propulsion, Refrigeration, and the Various Uses to which Compressed Air has been applied. Includes forty-four tables of the physical properties of air, its compression, expansion, and volumes required for various kinds of work and a list of patents on compressed air from 1875 to date. Over 500 illustrations, 5th Edition, revised and enlarged. Cloth bound, $5.00. Half Morocco, price . . . . $6.50 8