Methods of machine shop work : for apprentices and students in technical and trade schools (1914)
Halsey, Frederick A. (Frederick Arthur), 1856-1935 · New York : McGraw-Hill · leaf 106
e deter-mined the gears were marked so as to insure their future Professor Rogers obtained the method from M. Froment of the French firmDumoulin and Froment, makers of optical and scientific apparatus. MEASURES OF LENGTH 95 replacement in the same relative positions in case it was founddesirable to… … Fir.. 67.—Precision lathe of the British National Physical Laboratory. which is in many other respects far superior to it. Among thesemay be noted the support of the machine upon three points andby a suitably trussed sub-frame casting; the provision of a tubularbed which, in torsion, is enormously…
Machine-shop practice
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