A textbook on mechanical and electrical engineering (1902)
International Correspondence Schools · Scranton : International Textbook Co. · leaf 333
ygon and whosesides are triangles uniting at a common point called thevertex. The pyramid for the projec-tions of this problem is shown inFig. 27, where its dimensions are clearh*indicated. Since these drawings arevery easy and are constructed in a man-ner similar to those of preceding prob-lems,… … §15 PRACTICAL PROJECTION 67 Explanation.—The plan of this projection is most con-veniently drawn tirst, a circle If inches in diameter beingdescribed from (9 as a center, as shown on the plate. Theedges of the pyramid are then drawn: a horizontal diameterand two diameters at angles of 60° with the…
