Practical draughtsmen's work, with numerous engravings and diagrams (1903)
Hasluck, Paul N. (Paul Nooncree), 1854-1931, ed · Philadelphia, D. McKay · leaf 78
equal to A c or d b, describe thesmall circles shown, cutting one another in the points e and f.Parts of these circles form parts of the ellipse, the remainders ofthe circles being shown dotted. To determine the extent of thefull lines from each point of intersection, draw lines through thecentres… … Fig. 130.—Approximate Method of Drawing an Ellipse. shape as shown at Fig. 131. With a as centre, and c d as radius,mark the point e. Divide the distance eb into three equal parts.With o as centre and two of these parts as radius, cut line ab inM and N. With m and n as centres and with m n as…
Mechanical drawing
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