Kenison, Ervin, Bradley, Harry Cyrus, 1871-1936 · New York : The Macmillan Company · leaf 284
to thatnumbered 1. On the base of A there is no choice, and point 2 is placed on HU as shown. On the cylinder B either elementlying in the plane U is adjacent to element 1. Choice is heremade as shown by the number 2 on the base of B. That is,having chosen our starting point on the curve, we may… … Fio. 320 (repeated). 264 DESCRIPTIVE GEOMETRY [XXV, § 192 the number 3 must be placed on the nearer element to 2. Con-tinuing, the two 4s are put on HW, and the two 5s on HZ.We have now followed the curve across all the planes; thecurve, in continuing, crosses the planes in reverse order, sothat…
Geometry, Descriptive
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