John Jacob Holtzapffel · digital reprint by www.CircuitousRoot.com · leaf 523
same tools are employed in the same manner as for work executed on the spherical chuck used alone, the questions to be here dealt with are principally those which regard the different forms and positions given to the work by the interposition of the second chuck. The eccentric or the rectilinear… … turn adjusted vertically by the set square and the wormwheel of the particular second chuck employed. The wheel is then turned one quarter round and the index placed one quarter round on the division plate, when the spherical chuck becomes again vertical and the slide of the eccentric chuck…
Ornamental turning
Internet Archive · Dr. David M. MacMillan · Public Domain Mark 1.0. Free to use for anything.
