Practical plane and solid geometry for advanced students, including graphic statics, adapted to the requirements of the South Kensington syllabus (1899)
Harrison, Joseph, Baxandall, George Albert · London Macmillan · leaf 368
ns of any two spheres, centres £ andC, inscribed in the given cylinder. Now draw the projections of the two upright coneswhich circumscribe the spheres, each cone having a baseangle 9. Determine the plane NML to touch the cones. Since this plane touches the two cones, it touches bothspheres without… … 2 A 354 PRACTICAL SOLID GEOMETRY chap. 294. Problem. — Having given the projections of acone, axis VA, and p the plan of a point on its surface, todetermine the traces of a plane which shall pass throughP and touch the cone. Let rvs and uvw represent the given cone. First Method.—By Prob. 278…