Jopling, Joseph, Gladwin, George, fl. 1821-1838 · London : M. Taylor · leaf 92
86 ISOMETRIC A L PERSPECTIVE. the diameter of the cylinder is to that of the ring, the greater the variation of the profile is from the form of an isometrical ellipse. Fig. 164. … Fig. 165 is a representation of half the ring and pe¬ destal, the angle of the pedestal being next the observer. The dotted curved lines, the sections of the cylinder, and the line a surrounding it, are isometrical ellipses. The line b is part of an ellipse of the same proportion as the section of…
Axonometric projection · Perspective
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
