Walker, William, b. 1821 · New York : C. Scribner · leaf 248
nd B. !N^ext ascertain by pencil-in-hand measurement(see Appendix C) the apparent height of the back linefrom A B, and draw it parallel to A B. A book placed infront of the spectator, like Fig. 1G8, would be drawn inthis manner. A jiarallel view of an object may be definedsimply as one having its… … Fig. 168. should not exceed G0°, especially in the representationof right-angled forms. This limited angle of vision isless important when representing irregular forms, such asmountains, trees, or clouds. 320. Fig. 169 is the same cube as seen when placed alittle below the eye and to the left of…
Drawing -- Study and teaching
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