Jopling, Joseph, Gladwin, George, fl. 1821-1838 · London : M. Taylor · leaf 79
73 ISOMETR1CAL PERSPECTIVE. a by the longest diameter of the ellipse, of the same length as a b, the diameter of the circle in fig. 136; then, parallel Fig. 136. Fig. 137. … to a radius or side of the cube, draw the lines a c and a d> or be and b d. and the points at the extremities of the shortest diameter will be found. If the end of a cylinder, or any other object is small, these eight points, with a steady hand, may frequently be sufficient to determine the line of…
Axonometric projection · Perspective
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
