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 441
ed. Produce df and draw a linefrom c parallel to it. Draw Z per-pendicular to these lines, and indexit to correspond with the points / and c. This is the scale ofslope of the plane required. To determine the plan of the line ae and its point of contactwith the cone. Assume ae to be the generatrix… … Fiff. 222. HORIZONTAL PROJECTION 421 must consequently be at tlie given angle (30°) with the H.P.Draw fc perpendicular to the H.T. This is the line of contactbetween the cone and the T.P., and where it intersects aEin the point -p is the point of contact between the line andthe cone. To determine…
Geometrical drawing
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