Author: MECHANICAL.
Title: Mechanical World Year Book 1937.
Description: Manchester, Emmott & Co., 1937. Hardcover. B/W photos & illus. Some rubbing to covers, hinges a little loose but binding still good. Good condition. Includes articles on toothed gearing, helical gears etc. plus advertising. 146pp; 360pp; 200pp.

Keywords: mechanical technical mechanic history 20th twentieth century gearing