Walker, William, b. 1821 · New York : C. Scribner · leaf 271
Fig. 203. 16 242 0)1 Technical Perspective. THE PICTURE LINE, or Ground Line, or Base Line, is theline forming the bottom edge of the picture plane, and rest-ing on the ground plane. THE ELEVATION is the upright yiew of an object, as seenwhen directly in front of the spectator. A square is… … Fig. 204. THE POINT OF SIGHT is tlie point on the picture planeexactly opposite the spectators eye, and is sometimes calledthe ^ Sight Point. THE CENTRE OF VISION is that point on the picture planewhich is exactly opposite to the point of sight—i. e. theeye of the spectator—and is sometimes called…
Drawing -- Study and teaching
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