John Jacob Holtzapffel · digital reprint by www.CircuitousRoot.com · leaf 515
was vertical, with the point of the arch downwards, and its further rotation was checked by the segment pin now placed in contact with the upper screw of the stop, and the second curve A, G, was cut in like manner to the first. These two arcs thus crossed one another and formed the apex of the arch… … from the center of the mandrel so as to remove all the mate- rial to the corners of the plate C, D, to one level, the surface of the wall space. The external blocking out was then completed with the work standing as in fig'. 501, first depressed and then gradually raised for the horizontal traverse…
Ornamental turning
Internet Archive · Dr. David M. MacMillan · Public Domain Mark 1.0. Free to use for anything.
