Appleton's dictionary of machines, mechanics, engine-work, and engineering (1869)
New York, Appleton · leaf 590
\ \ 2^ … In general the angles of the points of < teeth are rnnre acute, the softer the material tobe sawn, agreeably to common usage in cuttingtools; and the angles of the points, and those at // // which the files are applied, are necessarily tin-same. Thus in sharpening Baws for metal, the file is…
Mechanical engineering
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
