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HE power and lighting installation of The

THE

New York Public Library comprises two 200 kw. and two 500 kw. two-wire 250 volt compoundwound Westinghouse generators driven by four Fitchburg engines and eight 250 hp. Babcock and Wilcox boilers. For emergency and night loads there is a storage battery plant of 141 cells. Power is furnished to the Library's printing office and bindery, machine shop, ventilation system, elevators, sidewalk lift, and book conveyors. There are 25,000 electric outlets. The cost for heat, light, and power in 1915 was $25,157.89.

form p-56 [ix-13-16 3m]

NEW TECHNICAL BOOKS

Titles marked with a star (*) are not for circulation, and may be consulted only in the Technology Division, Room 115, Central Building, Fifth Avenue and Forty-second Street, daily from 9 a. m. to 10 p. m. Sundays, 1 p. m. to 10 p. m.

Aeronautics

1. Gill, Napier John. The flyer's guide, an elementary handbook for aviators. London: H. Rees, Ltd., 1916. vii, 102 p.

illus.

8°.

VDY

Believing that an air pilot should understand not only the principles of flight but also the construction and care of aeroplanes and their engines, the author has included such information in his instructions to the beginner. His chapter on "Practical flying" is devoted to the military aspect of aviation.

Automobiles

2. *Duryea, Charles E., and J. E. HOMANS. The automobile book; a practical treatise on the construction, operation and care of motor cars propelled by gasoline engines; with full explanations of all the essential parts. New York: Sturgis & Walton Co., 1916.

2 p.1., 348 p. illus. 8°.

TON

An up-to-date and simply written manual in which the different parts and their modes of operation are clearly described. The inquiring owner will here find the advantages and disadvantages of certain types of apparatus fairly discussed, as for example eight and twelve cylinder motors, air cooling and water cooling, etc. There is a good chapter on the selection of the car.

3. Hayward, Charles Brian. Automobile ignition, starting, and lighting; a comprehensive analysis of the complete electrical equipment of the modern automobile, including many wiring diagrams and details of all the important starting-lighting systems. Chicago: American Technical Society, 1916. 4 p.l., 381, 7 p. illus. 8°.

TON

"The author, who for years has been very closely associated with automobile and electrical affairs, has tried to present his material to meet the needs of the general reader and at the same time reach the difficulties of the repair man. For the latter classification the wiring diagrams have been carefully analyzed, and full instructions have been given for the various types. The discussion of the earlier as well as the latest models of each particular system and the variations of the same system on different cars should be helpful.". From the preface.

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