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 402
e given sphere,and a and a! the projections of the given point. Draw a horizontal linethrough a meeting the circlein d. Join d to the centreof the sphere c. Through ddraw a line perpendicular tode till it meets XY in/, and aperpendicular to XY through xc\ in C. By repeating thisconstruction on the… … Fig. 179. of a plane tangential to this cone, and passing through thegiven point, they must also be the traces of the plane required. With e as centre, and radius equal to ed!, draw a circle. Thisis the plan of the circle of contact between the sphere and thecone. With c as centre, and radius equal…
Geometrical drawing
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