Worm gearing . Frontspiece. A Fifteenth Century Worm Gear from an Etching by Albrecht Diirer. WORM GEAMNG BYHUGH KERR THOMAS M. I. MECH. E., M. A. S. M. E., M. I. A. E. Second EditionRevised and Enlarged McGRAW-HILL BOOK COMPANY, Inc. 239 WEST 39TH STREET. NEW YORK LONDON: HILL PUBLISHING CO., Ltd. 6 & 8 BOUVERIE ST„ E. C. 1916 \ *Si t .» Vi .^ C^^ i* Copyright, 1913, 1916, by theMcGraw-Hill Book Company,

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Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyo, bookyear1916