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267353 Don Schwartz <dks@t...> 2018‑12‑17 a good read
Some time ago I came across a little book which is proving to be quite 
interesting.

Workshop Appliances, by CPB Shelley ( 10th ed., Longmans Green & Co., 
London and New York, 1894), apparently part of a series 'Text-books of 
Science, Adapted for the use of Artisans and Students in Public and 
Science schools'.

Much of the book is devoted to metalworking and metalworking machinery, 
but there is considerable discussion of hand tools, measurement and 
treadle lathes. The measurement section contains a comparison of line 
measure ( think ruler ) vs end measurement ( think calipers ). A section 
on file-making is the most detailed I have encountered. One particularly 
fascinating claim is that the fineness of hand-cut files was down to 
3000 cuts per inch!

FWIW

Don

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