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 416
projector from c till it meets de in c. This is thecentre of the sphere C. Draw it, to complete the elevation. If we now assume two cones lying with their vertices on the TANGENT PLANES AND SOLIDS 395 H.P., and each enveloping two of the spheres, a line joiningtheir vertices must he the H.T. of the… … them determines the H.T. If we were to draw tangents to thecircles A and C, they would also meet on this line,as shown in plan. We will now draw a supplementary elevation of the threespheres, projected on a V.P. perpendicular to the H.T. Assume, in any convenient position, a new ground line…
Geometrical drawing
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