Osgood, William F. (William Fogg), 1864-1943, Graustein, William C. (William Caspar), 1888-1941, joint author · New York : The Macmillan Company · leaf 552
Fig. 1 quadric cylinder whose directrix is a central conic is symmetricin each point of the line drawn through the center of the conicparallel to the rulings. This line is called the axis of thecylinder. Sections of Quadric Cylinders. The curve in which a quadriccylinder is met by a plane, M, which…
