The teaching of drawing : its aims and methods (1910)
Polak, Solomon, Quilter, Harry Charles · London : W.B. Clive, University Tutorial Press · leaf 105
Fig. 92. The ends of the triangular prism (Fig. 92) are parallelto the picture plane, and consequently retain their true form, and the corre- \ … sponding edges oftheir ends are repre-sented geometricallyparallel to each other. 109. Ascendingand DescendingLines.—Difficulty isexperienced frequentlyin determining inwhich direction obli-que parallel lines suchas 1-6, 4-7, and 6-2,7-3 (Fig. 91) converge.The direction is indi-cated by means of…
Drawing
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