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Orthographic and isometrical projection : development of surfaces and penetration of solids (1868)
Davidson, Ellis A · London : Cassell, Petter, and Galpin · leaf 95
Plate XXXxV.Projection · Mechanical drawing
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
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![An illustration from Practical perspective; or, Perspective made easie. Teaching by the opticks, how to delineate all bodies, buildings, or landskips, &c. By the catoptricks, how to delineate confused appearances, so as when seen in a mirror or pollisht body of any intended shape, the reflection shall shew a designe. By the dioptircks [sic], how to draw parts of many figures into one, when seen through a glass or christal cut into many faces.. (1670)](https://img.insideoutlibrary.com/img/200/ia-practicalperspec00moxo-143-0.webp)
