Percival, A. S. (Archibald Stanley), 1862- · London ; New York [etc.] : Longmans, Green and Co. · leaf 30
hrough R meetingPC in S will define the direct square. If PS be given and CD. Join PD2 and draw horizontals PQ and SR through P and S ;then R is the intersection of PD., and SR, and Q is the intersectionof PQ and CR produced. If CJD be given, draw the horizontals PQ and SR ; join P5D2cutting SR in… … f L HP Q Fig 13.Let b be the given point (Fig. 13), and let PQRS be the directsquare. Make HQ equal to Pb, join PR, CH and Cb, let the 27 diagonal be cut by CH in m and by Ch in n. Then md drawnhorizontally will define d on the left, and the horizontal na willdefine a on the right, and h will be…
Perspective
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