Practical draughtsmen's work, with numerous engravings and diagrams (1903)
Hasluck, Paul N. (Paul Nooncree), 1854-1931, ed · Philadelphia, D. McKay · leaf 75
epth but getting gradually less inwidth, as Fig. 125, and ultimately showing only a straight line, asFig. 126. Every intermediate position that can be taken betweenFigs. 124 and 126 will give an ellipse, so that there is no fixed 72 FBAGTWAL DRAUGHTSMENS WORK proportion between the two diameters;… … POINT OFSIGHT IN PLAN Yig. 127.—Ellipse Projected from a Circle. It has been contended that, although the perspective view ofa circle is something like an ellipse, it would quickly be detectedas out of drawing, but it will be found that the statement iscorrect. The centre lines of the circle will…
Mechanical drawing
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