Nr. 63
Discriminant surface of the equation of the 4. order
Row: 2

Nr. 62
Discriminant surface of the equation of the 4. order
Row: 2

Nr. 363
Projective generation of two conic sections
Row: 3

Nr. 52
Tangent surface of the cubic ellipse
Row: 3

Nr. 24
Movable single-leaf hyperboloid
Row: 3