de, the series ofintersections thus found are points in thecurve, and by tracing a line through them thecontour will be completed. In fig. 17 a method is given in some respectssimilar to the preceding. Having joined a b,describe upon it the semicircle a db; from thecentre c draw a series of lines… … Fig. 17.to the semicircle—c e equal to c d, for example;the extremities of these lines will be as manypoints in the curve. If the recess of the curveis required to be less than e c, as for instance,c n, then set off c 0 equal to c n, and describean arc a ob from the centre i, which will befound…
Design · Decoration and ornament · Art
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
