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 167
the point central,the hole would be the same diameter as the drill, while if itis not central it will drill a hole larger than the drill bytwice as much as the amount the point is out of center, asshown at Fig. 130. A very good guide to tell if each edge isdoing its proper share of the work is to… … 1—- Fig. 129.
Clocks and watches · Lathes
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