By GROVER CLEVELAND LOENING, B.Sc., A.M., C.E.
12mo, 340 Pages, 278 Illustrations. Price, $2.50 postpaid
A New and authoritative work, covering the whole subject of the aeroplane, its design, and the theory on which its design is based, and containing a detailed description and discussion of thirty-eight of the more highly successful types. It is a thoroughly practical work, and invaluable to any one interested in aviation. The scientific exactness of the valuable data and references, as well as the high character of the innumerable illustrations and diagrams, renders this work, easily, the most useful, practical and complete that has as yet been contributed to the literature on aeroplanes.
An illustrated descriptive circular sent free on application.
Mechanical Movements,
Powers and Devices
By GARDNER D. HISCOX, M. E.
Octavo, 403 Pages, 1,788 Illustrations. Price, $2.50.
This is a collection of 1,788 specially made illustrations of different mechanical movements, accompanied by appropriate descriptive text. It is practically a dictionary of mechanical movements, powers, devices and appliances and contains an illustrated description of the greatest variety of mechanical movements published in any language. This work covers nearly the whole range of the practical and inventive field, and is of much value to inventors, draughtsmen, mechanics, machinists, engineers and all others interested in any way in the devising and operation of mechanical work of any kind.