Norman Lathrop Enterprises  
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Lathrop Report On Newspaper Indexes
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Detailed entries for one subject from the INDEX TO HOW TO DO IT INFORMATION.
Click on a see also (sa) or tracing (xx) to view detailed entries about a related subject.
The entries are in alphabetical order by magazine name and then in chronological sequence.
To obtain a copy of any magazine article contact your local public library or the publisher.

METAL LATHE DRILLING & CORING
xx   METAL DRILLING & CORING
xx   METAL LATHE

Squaring the circle. Technique for cutting into a round hole (edgewise) with a square cutting tool. Repeating this process over-and-over, taking off a small amount of metal each time, results in a perfectly square hole.
PROJECTS IN METAL Apr 1989 (v.2#2) pg. 15