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 517
mine the points g and li, we must make a supple-mentary elevation of the sphere with its axis at the samedistance from the V.P. as that of the axis of the cone. To do 496 SOLID GEOMETRY this, take the distance on, and set it off from o on the line oV.This determines the point iST. With this point… … Fig. 282. the line iv in the points g and Ji. Draw projectors from thesepoints till they meet the line oi in the points g and h. Havingdetermined all the points, draw fair curves through them. 2. To develop the line of interpenetratiou. Draw the linevH. in any convenient position. With v as centre,…
Geometrical drawing
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