Practical draughtsmen's work, with numerous engravings and diagrams (1903)
Hasluck, Paul N. (Paul Nooncree), 1854-1931, ed · Philadelphia, D. McKay · leaf 80
ning them up. When W - - • - - -de- -<- - ad - • IB PAPER A TRAMMEL. i — Fig. 133.—Paper Trammel for Drawing Ellipses. this is done, a light thin line should be sketched continuouslythrough all the dots, endeavouring at the same time to correctany irregularities. When the pencil curve looks all… … Fig. 134.—Use of French Curve. (Fig. 134), and drawing only from / to g, so that there is alwaysa piece at each end that appears to fit but is not used. By thismethod an ellipse will be obtained as regular in its outline as acircle drawn with compasses. It is worth taking some painsover it, because…
Mechanical drawing
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