Woods, Frederick S. (Frederick Shenstone), 1864-, Bailey, Frederick H. (Frederick Harold), 1865- · Boston, New York [etc.] Ginn and Company · leaf 323
the surface is symmetrical with respect to the planeXOY, the result being independent of the sign of z1. Accordingly this surface, called the imparted hyperboloid or the hi/per-boloid of one sheet, may be generated by an ellipse of variable magnitudemoving always parallel to the planeXOY and with… … Fig. 190 SURFACES 307 T* II* ~a Ex. 5. -a + g + 5 = 1- a- 6- c- This. surface (fig. 191) is theellipsoid. Ex. 6. /;-
Geometry, Analytic · Calculus
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