A new manual of perspective: containing remarks on the theory of the art, and its practical application in the procudtion of drawings ... Illustrated by numerous engravings (1849)
Whittock, Nathaniel · London, A. Hall & Co. · leaf 20
A perfectly upright line iscalled a perpendicular line. Theline drawn from d to e is a per-pendicular line. A line leaning from the per-pendicular towards the groundline, as at f c, is called an in-clined line. F 0 Lines that appear bent, or wavy, are calledcurved lines. 1 is apart of a circle, and… … Fig. 8. A point is always represented by a smalldot, thus (.) A point has in reality no form, B 18 MANUAL OF PERSPECTIVE. Fig. 9. and the speck, or dot, is used to show the placeto which lines that are to be drawn towardsa certain point may be taken.Points have different names, ac-cording to the…
Perspective
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