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 307
, because the right line CD touches the two planes in thepoints C and F, it will touch them in the point D; therefore thepoint D is coir.mon to the two planes. Tl)e same may be sliownconcerning every other point. Wherefore the two planes coincide Fia-ass. * in all points, or are one ?nd the same… … Let the line AB (Jig. 329.; make right angles with the lines AC, AD, it will be perpendicular to the plane which passes through these Hues. B If the line AB were not perpendicular to the FDCG, another planemight be made to pass through the point A, to which the AB wouldbe peri)eridicular. But this…
Architecture · Architects
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