Anthony, Gardner Chace, 1856- [from old catalog], Ashley, George Francis, [from old catalog] joint author · Boston, D. C. Heath & co. · leaf 137
ix cd^ will be in theposition t when it lies in the principal me-ridian plane, and f will be a point in the ver-tical contour, which is an hyperbola. 156. Through any point of the surface todraw an element. If one projection of thepoint be given, draw a parallel of the surfacethrough this point to… … Fig. 194, HYPERBOLOID OF REVOLUTION OF ONE NAPPE 121 ties of which lie in the horizontal projectionsof the upper and lower bases of the surface.Since either extremity may be regarded aslying in the upper base of the surface, thereare two tangents which may be drawn throughthe given point. They will…
Geometry, Descriptive
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