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 345
is necessary, and that is founded on a principle common to alll»rojections ; viz. that the length of an inclined line -projected or foreahortened on a plane,depends upon the differeucf of the jjerpvndiiiilar eUnigaiion of its extremities from the plane. 324 THEORY OF ARCHITECTURE. Book II. whence… … FK. im 1160. In the application of this rule to the oblique pyramid oi fig. 489., the position ofthe ])oint P {fig- 490.) must be shown on the plan or horizontal projection answering to theapex of the pyramid, and from this point perpendicular to the face CD on the same sidethe perpendicular PG…
Architecture · Architects
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