Algebraic Curves and Surfaces Ia Ellipsoids Ib Hyperbolic paraboloids Ic One-sheet hyperboloids Id Two-sheet hyperboloids Ie Elliptic paraboloids If Cones and cylinders Ig Confocal systems, conics II Generation of conics and surfaces of second order III Curves of third and fourth order IV Surfaces of third order V Cyclides VI Other surfaces of fourth and higher order VII Line geometry VIII Singularities IX Descriptive geometry XX Others