Young, George, jr, Baxter, Hubert Eugene, joint author · New York, Macmillan · leaf 259
bove. However, the method using therate of motion is usually more convenient. The problem which arises most frequently in connectionwith warped surfaces is to fix the character of the interveningsurface when two directrices are given as limits. One suchrase has already been shown in Fig. 223.… … Fio. 223 XI, § 201] APPLICATIONS OF CHAPTERS VII-VIII 241 of the opening must be the same inside and out, both at thecrown and at the springing line. Four methods of generation are shown and others are pos-sible, of course. In order to assist in a clear conception of thedifference between the…
Geometry, Descriptive
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