Smart, Edward Howard · London : Macmillian and Co. · leaf 139
Xat Fig. 56a. In the former (hyperbola), since of the two conjugate lines whichproject into the axes, one cuts the circle in points which areon opposite sides of the vanishing line, and the other does not … \at C =X rt/ CO Fig. 566. cut the circle in real points, one axis in the projected figurecuts both branches of the curve and the other cuts neither. 112 PROJECTIVE GEOMETRY In the latter case (parabola) one conjugate line is thevanishing line itself, and the other passes through its point ofcontact…
Geometry, Projective
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