Hart, C. A. (Clara Avis), b. 1863, Feldman, Daniel D., b. 1872 · New York, American Book Co · leaf 394
Fig. 1. Cylindrical Surface Fig. 2. Cylinder 820. Defs. By referrmg to §§ 693 and G9-4, the studentmay give the definitions of generatrix, directrix, and element ofa cylindrical surface. Point these out in the figure. The student should note that by changing the directrix froma broken line to a…
Geometry, Plane · Geometry, Solid
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