Handbook for machine designers, shop men and draftsmen
A 1916 McGraw-Hill technical handbook by Frederick A. Halsey, compiled for American machine designers, shop workers, and draftsmen. Its 425 line diagrams show gear teeth, bevel and worm drives, flanged hubs and bolt circles in section and plan, with hatched cutaways, centerlines, angle arcs, and letter-keyed dimensions usable as engineering-drawing motifs or diagram vocabulary.
