John Jacob Holtzapffel · digital reprint by www.CircuitousRoot.com · leaf 79
NTAL TURNING. screws of the sliderest, the ornamenting chucks, and the cutting frames have all been long made of ten threads to the inch, and all are provided with micrometers similarly divided into ten equal parts, numbered 0 to 9, and these major or "whole" divisions are subdivided by shorter… … mainscrews, a method that not infrequently leads to confusion from mistake as to the noun. All possibility of such errors is avoided by the employment of a decimal notation, and as this system is followed throughout all the measures given in the following pages, the undermentioned examples may…
Ornamental turning
Internet Archive · Dr. David M. MacMillan · Public Domain Mark 1.0. Free to use for anything.
