John Jacob Holtzapffel · digital reprint by www.CircuitousRoot.com · leaf 620
closely ap- proached to the card surface by the depth screw of the recep- tacle, then receives its final advance and penetration by the milled head of the holder, after which it is thenceforward advanced and withdrawn by the lever. The stem of Mr. Priestley's alternative arrangement fig. 575, has a… … its end covered with a slightly rounded smooth cap or rubber, is placed above the tool, and this by lightly rubbing on the work in the same manner as in rose-engine turning, prevents accidental excess of advance of the cutting or scribing point. Charming effects from the personal practice of this…
Ornamental turning
Internet Archive · Dr. David M. MacMillan · Public Domain Mark 1.0. Free to use for anything.
