London : Longman, Rees, Orme, Brown, Green, and Longman · leaf 477
llings, with an instrument included. The method of using it is as follows. Let j9 (^o-. 208.) be anypoint, the perspective of which is required ; draw ab, to signify theedge of the picture; parallel to which draw the ground line i h ;r is the edge of the drawing-board. Make choice of any… … angle h; this done, slide the T-square I p to the position d q,so that the line a b shall come into the angle d; then the pointq so found [is the perspective of 7;; and in the same manner allother points may be found, which being joined with lines, willgive the perspective of any figure or solid,…
Architecture
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