Percival, A. S. (Archibald Stanley), 1862- · London ; New York [etc.] : Longmans, Green and Co. · leaf 25
n a parallelogram PQRS. wherethe end ha of the box is 30° and the long side hd is 60° from thehorizontal line PQ. With compasses or dividers hg is marked off inthe plan equal to hg in the side elevation, and from the point gin the plan a dotted line gg^ is drawn parallel to the long side ah… … in H. We have still to devise some means of indicating the positionsof d and a on PQ. The simplest way is to draw a diagonal QS andlet horizontals from d and a meet this diagonal ; from these meetingpoints perpendiculars are drawn to PQ cutting it at M and N. We have now determined all the…
Perspective
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