Elementary course in woodwork ; designed for use in high and technical schools, with one hundred and thirty-four illustrations, by George Alexander Ross (1901)
Ross, George Alexander · Chicago, New York, A. Flanagan Company · leaf 112
The return or twist re-quires to be developed by descriptive geometry, and to do this we will refer todrawing Fig. 121 in order to find the diameter of thewell. It will be noticed that one half of the twist isparallel with the landing and that the curve for thathalf would be a true quarter circle,… … Fig. 127 angle to its axis; the section through which the cylin-der was cut would be an ellipse, an illustration of which is shown by Fig. 128.To develop this part of theellipse lay out, on a board,by the following method,a full sized drawing of therail required. On the board draw astraight line…
Woodwork (Manual training)
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
