Anthony, Gardner Chace, 1856- [from old catalog], Ashley, George Francis, [from old catalog] joint author · Boston, D. C. Heath & co. · leaf 84
Fig. 140. Fig. 141 98. Cylindrical Surfaces. The cylinder isthat limiting form of the cone in which theapex is removed to infinity. It may be gen- erated by a rectilinear generatrix which movesso as always to touch a given curved directrix,having all of its positions parallel. A planecutting all…
Geometry, Descriptive
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