Furniss, Dorothy · Pelham, N. Y. : Bridgman Publishers · leaf 169
beginner, on occasion, may wish tocheck his drawing of a circle by enclosing it in a square. In Fig. 57 we have an upright circle in a square, also acircle enclosed in a square and in perspective—i.e., recedingfrom the spectator. Strictly speaking, many perspective problems belong togeometry and… … Fig. 56. The Fobeshorteking op Curves and Arches Every receding line or surface must necessarily be fore-shortened. What is foreshortening ? A coin seen upright and straight in front is a perfect circle ;a coin seen lying down is a coin diminished and a coin fore-shortened. In the first example the…
Drawing -- Study and teaching
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