Smart, Edward Howard · London : Macmillian and Co. · leaf 145
N^V^, and draw a line at right angles3 units in length. The extremity of this is Vo, the elevationof the vertex of projection. Draw from Ng a line inclined at 30° to LoN^. This and NoN^ represent the lines in which the plane ofprojection cuts the vertical and horizontal planes, and arecalled the… … Fig. 58. V^ moves in the elevation figure over an arc of a circle,centre Lg, to V the rabatted vertex. We have therefore all that is required to construct theprojected figure. Take any chord PjLjQj through Lj. The projections of Pj and Qj are, by the method of §8,Chap. VII., the points where VP^,…
Geometry, Projective
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