Descriptive geometry for students in engineering science and architecture; a carefully graded course of instruction . turally assume its properdirection. In Fig. 32 a right cylinder is arranged so that its axis is at 50° to the at 15° to the This means that the circular end will be at 40° to Its plan should be found by the method previously explained. The com-pound angle for any length of line RR is found in such a way (see Fig. 24, (iii))that when the arrow line, which indicates the direction for the plan of the axis,is obtained, and the plan of the axis of the cylinder i
Descriptive geometry for students in engineering science and architecture; a carefully graded course of instruction . turally assume its properdirection. In Fig. 32 a right cylinder is arranged so that its axis is at 50° to the at 15° to the This means that the circular end will be at 40° to Its plan should be found by the method previously explained. The com-pound angle for any length of line RR is found in such a way (see Fig. 24, (iii))that when the arrow line, which indicates the direction for the plan of the axis,is obtained, and the plan of the axis of the cylinder is made parallel to it, the lowerend of the cylinder is turned away from the and appears in the vertical pro-jection in full view, therefore is clear-Hned all around. The upper end will bepartly outlined by a dotted line. The elevation of the axis should be drawn, PROJECTION OF SIMPLE SOLIDS 33 and, of course, will not be at 50^ to XY. When the elevation ellipses have beencorrectly drawn, the width of the elevation of the cylinder, that is, at right anglesto the axis, will be the same as that of the Fig. 3j. In Fig. 33 a regular pentagonal pyramid is made to rest with one of its tri-angular faces in the and the axis of the solid—the line from its apex to thecentre of its base—is at 30° to the This means that the compound angle
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisheretcetc, bookyear191
