Models of rubric: Other surfaces of fourth and higher order Model 46 Movable single-leaf hyperboloid Model 77 Right-angled paraboloid Model 78 Cylindroid Model 79 Cylindroid combined with a right-angled paraboloid Model 87 Developable surface of higher order Model 88 Developable surface of higher order Model 89 Developable surface of higher order Model 90 Developable surface of higher order Model 91 Developable surface of higher order Model 92 Developable surface of higher order Model 93 Developable surface of higher order Model 94 Developable surface of higher order Model 122 Cylindroid made of carton discs Model 122 Cylindroid made of carton discs Model 123 Kummer surface with 8 real double points Model 124 Kummer surface with 16 double points Model 125 Kummer areas with 8 respectively 16 respectively 4 real intersections Model 126 Surface of 4. order with 4 planes touching along circles Model 127 Areas of 4. order with 4 circles touching along the plane Model 128 Surface of 4. order with 4 planes touching along cicles Model 129 Surface of 4. order with 4 planes touching along cicles Model 130 Surface of 4. order with 4 planes touching along cicles Model 131 Surface of 4. order with 4 planes touching along cicles Model 132 Surface of 4. order with a double line Model 133 Surface of 4. order with double lines Model 134 Surface of 8. order Model 151 Chord central point area of a space curve of 4. order. Model 152 Surface of 12. order Model 302 Surface of 5. order with many symmetry attributes