The watchmakers' lathe, its use and abuse; a story of the lathe in its various forms, past and present, its construction and proper uses (1903)
Goodrich, Ward L. [from old catalog] · Chicago, Hazlitt & Walker · leaf 168
—A … Fig. 131. Fig. 132. spiral or twist form of the drill. The best way to avoid anytrouble is to put a piece of metal at the back into which thedrill can run until the cutting edges are entirely through thework, which will finish the hole up true and smooth. The flat, or diamond point, drill, as…
Clocks and watches · Lathes
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
