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 332
(^,11 A p. I. CONIC SECTIONS. 311 … Fig. 432 \y Coroll. Hence AB^ ; GE=:: C P^-CA^ : PAF (/ig.432.). For let the cutting planeof the opposite hyperbola intersect two circles parallel to the base in111 and PM, and let the cone be cut by another plane parallel to thebase, passing through the centre C of the transverse axis, and let…
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