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 328
e shape of the section is anellipse. (c) To obtain the development. With S as centre,describe an arc with radius equal to sd, the length of agenerator. Take any point A on this arc, and by Rankines con-struction, Prob. 113, make arc AT equal to \ circumferenceof base of cone; and set off TB = AT.… … vvy Make SO = so = true distance of the vertex from thepoint O; and repeat this construction for the other points.A curve through these points is the development of thetrace of the cutting plane on the surface of the cone. Examples.—1. Determine the true shape of the section of a cone2h base, 3…