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 346
rom the vertex. 3. Two circles 2 and l| diameter, which have their centres 1^ apart, are the projections of two spheres, the heights of thecentres being respectively ii and 1 above the ground.Regard the points of intersection of the circles as the plans oftwo points on the upper and lower surface… … 332 PRACTICAL SOLID GEOMETRY chap. 279. Problem.—The plan of a cylinder of indefinitelength is given, the plan of the axis being indexed ; deter-mine the index of p, the given plan of a point on thelower half of the cylinder. First Method. — Let cd, with the indices attached,be the plan of the axis…