Spanton, J. Humphrey (John Humphrey) · London, Macmillan and Co., Limited; New York, The Macmillan Company · leaf 123
Fig. 2 obtain a conic section to suit anyto shape or size. A truncated cone or frustum is the part of the cone below anysection as A or B, Fig. 214. The Ellipse. An ellipse has two unequal diameters or axes, which areat right angles to each other. The longer one is calledthe transverse diameter,… … Fig. 219. 155. The two axes AB andCD being given, to con-struct an ellipse.Take a strip of paper andset ofif upon it the distanceFH, equal to half the majoraxis and the distance FG,equal to half the minor axis.By keeping the point G onthe major axis, and thepoint H on the minor axis,the point F…
Geometrical drawing · Design · Drawing
Internet Archive · Wellesley College Library · Public Domain Mark 1.0. Free to use for anything.
