Percival, A. S. (Archibald Stanley), 1862- · London, New York [etc.] Longmans, Green and co. · leaf 32
id the trouble of drawing a planin each case. I am indebted to Mr. Storeys book on Perspectivefor the following ingenious device :— On joining the intersections of the diagonals with the circle itis seen that a square is inscribed in the circle. On turning thisinscribed square through 45° we get… … Fig. 15,Let A^ be made J PQ (or from c drop the perpendicular eg-),and from Q drop the perpendicular QE equal to A^, then E^ mustbe equal to Qc or Ac. If then Ah and AA be taken on PQ eachequal to Eg, the distance hh^ must be equal to AB, the side of theinscribed square in Fig. 15 or Fig. 14. The…
Perspective
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