Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 730
dx ^1, etc., as the perspective of the circle. The projection of the circle is only necessary to give the height above theground line of the planes M M, N N, etc., in which lie the points taken on the PERSPECTIVE DRAWING. 713 circle. Had the circle been in any vertical plane other than a profile… … Fig. 1797. S^ Fig. 1798. projection of the cylinder. The base/y is revolved parallel to the horizontalplane and shown at s f h j and equidistant points taken on it. Set off abovethe ground line the heights s t,s h,s ti, and s h and draw horizontal linesthrough them. These lines will be traces on…
Mechanical drawing
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