Anthony, Gardner Chace, 1856- [from old catalog], Ashley, George Francis, [from old catalog] joint author · Boston, D. C. Heath & co. · leaf 109
42). Element A, ifextended, will in like manner be found topierce plane iVat point a. By connecting ah^he, cd, and da, the required lines of intersec-tion are determined. But, since point a doesnot lie on the given prism, only the portionsof lines ah and da which lie on the prism, i.e,eh and df,… … Fig. 165. THE HELICAL CONVOLUTE 93 The construction may be shortened byobserving that since the vertical projectingplanes of the elements are parallel, their linesof intersection with the given plane areparallel. The true size of the cut section is deter-mined by revolving each of its points into…
Geometry, Descriptive
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
