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 292
H is the horizontal trace ;hence the horizontal trace of the required plane will passthrough Ary. Draw the projections of a cone with its base on theground, its base angle <£, and its vertex at P; the requiredplane will touch this cone, and the horizontal trace willtouch the plan of the base of… … Unit = .031 Take any point/in //0t; draw the double line^r perpen-dicular to //,/, and draw pg parallel to hQt; then ft is thehorizontal trace of the required plane, and p41g is the planof a horizontal line at the level 41 ; hence the scale of slopefg can be indexed as shown. Examples.—1. Draw a…
