Page:Rulesexamplesofp00pozz.djvu/34

 The Delineation of an Oblong Square in Perpective

ET the Breadth BC of the Square A,  be plac'd in the Line of the Plan, by the Compas, or a folded Paper, and from the Points B  and C, make the Viuals to he Point of Sight O.   Then fold your Paper cros-wie, and mark CD the Length of the Square, drawing the Line DE to the Point of Ditance, and the Line FG parallel to BC, which will complete the Optick Delineation of the oblong Square

The other Figure hews the Folding of the Paper cros-wie, which is of ready ue in delineating Squares, whoe Breadth exceeds their Length, or vice verá; or whoe Length and Breadth are equal.