Jopling, Joseph, Gladwin, George, fl. 1821-1838 · London : M. Taylor · leaf 39
33 ISOMETRICAL PERSPECTIVE. Fig. 42. Fig. 43. … The sides of each of these three diagonal planes, which are perpendicular to the plane of projection, being in the direction of a radius and the minor diagonal of one of the three faces, their surfaces cannot in this projection be seen; but in order to give the learner, without a model, as correct…
Axonometric projection · Perspective
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
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