Essentials of Perspective: With Illustrations Drawn by the Author (1887)
Miller, Leslie William, 1848-1931 · New York: C. Scribner's Sons · leaf 62
mp-a Fig. 55- … Fig. 56. three lines on or in front of the picture must form an isosceles triangle also,* and that the line to the measur-ing-point is the base of it, so that the other two must be of the same length. This is the whole story, and ifwe adjust any drawing which we may happen to have in hand to these…
Perspective · Drawing -- Study and teaching
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