Appleton's dictionary of machines, mechanics, engine-work, and engineering (1861)
Appleton, firm, publishers, New York. (1852, D. Appleton & Co.) · New York : D. Appleton · leaf 177
oseof much larger dimensions, it will be convenient to consider as one group, the forms of the edges of thosedrills which cut when moved in either direction. Figs. 522, 523, and 524, represent, of their largest sizes, the usual forms of drills proper for the re-ciprocating motion of the drill-bow,… … -~-f u
Mechanical engineering
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