An encyclopaedia of architecture, historical, theoretical, & practical. New ed., rev., portions rewritten, and with additions by Wyatt Papworth (1888)
Gwilt, Joseph, 1784-1863, Papworth, Wyatt Angelicus Van Sandau, 1822-1894 · London Longmans, Green · leaf 841
thouse B be taken as a single object, then will the ex-treme visual rays cS and dS form, at the eye, the anglecSd, being the magnitude of the angle under whichthat object is seen. So of any object, the visual raysthat emi)race its whole extent form the angle of viewunder which it is said to be… … FlR. 83*. Chap. IV. PERSPECTIVE. 821 dition of the trees to their right and left. Let visual rays be drawn from the trees on bothsides to the station S. The angle CSD is the angle of view under which the whole extentis seen, and the rays CS and DS are denominated tlie extreme visual rays of the…
Architecture · Architects
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