Practical draughtsmen's work, with numerous engravings and diagrams (1903)
Hasluck, Paul N. (Paul Nooncree), 1854-1931, ed · Philadelphia, D. McKay · leaf 38
Fig. 49.—French Curve, arches and the lines of railway sidings. When curves of ever-varying radius are to be inked in, theFrench curve, shown in Figs. 49 to 51, is used, This consists … Fig. 60.—French Curve. of a flat piece of hard wood cut out into more or less intricatepatterns, with almost any curve between a straight line and avery small circle. When inking in a curve on the drawing withthe curve, it is necessary to find some portion of the >vood which 36 FRACTIGAL…
Mechanical drawing
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