Emerson, William, 1701-1782 · London : Printed for J. Nourse · leaf 224
and radius the tangent of the circlets dijlancefrom the pole of projection. 39 Let the circle PI be parallel to the plane GF,then the equal arches PC, CI are projeded into theequal tangents GC, CH •, and therefore C thepoint of contad and pole of the circle PI and ofthe projedion, is the center of… … ^l./;.34. SIICAL PROJECTION be projtliid into two right lines pir- > other. eniation of that circle which paSes f projedion is the line of meafures lie. hettce if a great circle he perpendicu-ler great circles, and its reprejinlationIter of projeiiion; then all tbefe cir~fmted by lines parallel…
Mechanical engineering
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