Geometrical drawing, projection drawing, freehand and ornamental drawing, wash work and brush drawing, elementary perspective drawing, architectural drawing (1921)
International Correspondence Schools · Scranton, PA : International Textbook Co. · leaf 73
ch other,as at rst, and as the plane of the ellipse approaches thevertex of the cone the ellipse diminishes in size until itreaches its limit in a point. From a point to a circle, then,is the limit of curvature of the ellipse. EXERCISE VProblem 22.—To draw an ellipse, the diametersbeing priven. See…