Spanton, J. Humphrey (John Humphrey) · London, Macmillan and Co., Limited; New York, The Macmillan Company · leaf 191
e section. Divide the height gji into anynumber of divisions,—they should be made closer together nearthe vertex,—and draw horizontal lines through them till theymeet the sides of the cone. SECTIONS OF SOLIDS. 77 The elevation of the section is determined by first finding asuccession of points, and… … intersecting the line DE in the points bb. Draw projectors tothese points till they meet the line drawn through GH in thepoints bb. Find the other points in the same manner, anddraw a fair curve through them. If the cutting plane were perpendicular to both the co-ordinateplanes, gh would be the…
Geometrical drawing · Design · Drawing
Internet Archive · Wellesley College Library · Public Domain Mark 1.0. Free to use for anything.
