Science and art drawing : complete geometrical course ; consisting of plane and solid geometry, orthographic and isometric projection, projection of shadow's the principles of map projection, graphic arithmetic and graphic statics (1895)
Spanton, J. Humphrey (John Humphrey) · London : Macmillan · leaf 326
the horizontal projection of the line required. From e draw the line eg perpendicular to ae. This will bethe H.T. of plane required. From g draw gh perpendicular to ae produced. This willbe the Y.T. of the plane required. By comparing these traces with those shown in Fig. 110,the angles they form… … Fi?. 113. (Tig. 113), its trace will be where the Y. traces of the two planesintersect; if it is parallel to the Y.P., as no (Fig. 114), its trace
Geometrical drawing
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