Perspective, a series of elementary lectures (1899)
Cone, Ada · New York, W.T. Comstock · leaf 56
50 PERSPECTIVE. an ellipse may be any width between a straight line and a circle, these two being the perspective poles of the curve. JTig. S4: There needs yet a little further construction, for ij is necessary to fix not only the outside limit for the petals, but also the point from which they… … and when the view is a side one, as B, Fig. 22, the point is found on the balancing line at its actual dis¬ tance from the outside limit, but in all elliptical views the perspective position of this point must be especi¬ ally determined. It will approach the centre of the
Perspective · Drawing
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
