Anthony, Gardner Chace, 1856- [from old catalog], Ashley, George Francis, [from old catalog] joint author · Boston, D. C. Heath & co. · leaf 134
lane Xthrough the perpendicular mg. This will in-tersect the elements at k, Z, and r ; the curve/S, connecting these points, will be the line ofintersection between the auxiliary plane X andthe warped surface. Since the curve aS and HYPERBOLIC PARABOLOID 117 tlie perpendicular throagii m lie in the… … through this point m, parallel to the planedirector iV, and determine its intersectionwith one of the directrices (Art. 150, page118). Through this, and the point m, drawthe required element. The last operation isnot illustrated in the figure.
Geometry, Descriptive
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