Set of 7 unassembled cardboard geometrical models in 4 packages showing surfaces of the second order on wooden stands [marked 1876-482]: (1) Ellipsoids having 22 sections, (2) Ellipsoids having 30 sections, (3) Hyperboloids of 2 sheets, (4) Hyperboloids of 1 sheet, (5) Paraboloids, (6) Hyperbolic Paraboloids, (7) Cones
One of seven unassembled cardboard geometrical models showing surfaces of the 2nd order (marked E23f-1901), Cones in two sheets [Kegel], only one of two parts present.
One of seven containing unassembled cardboard geometrical models showing surfaces of the second order (marked E23c-1901), Hyperboloid of 1 sheet [Einschaliges Hyperbolid].
One of seven unassembled cardboard geometrical models showing surfaces of the 2nd order (marked E23d-1901), Hyperoloid of 2 sheets [Zweischaliges Hyperboloid].
One of seven unassembled cardboard geometrical models showing surfaces of the 2nd order (marked E23e-1901), Elliptic Paraboloid.
One of seven unassembled cardboard geometrical models showing surfaces of the 2nd order (marked E23b-1901),Ellipsoids of 22 circular sections [Ellipsoid I ], only one of two parts present.
One of seven unassembled cardboard geometrical models showing surfaces of the 2nd order (marked E23a-1901), Ellipsoids of 30 circular sections [ellipsoid II ].
One of unassembled cardboard geometrical models showing surfaces of the 2nd order (marked E23g-1901), Hyperbolic Paraboloid [Hyperbolisches Paraboloid].
One of four cardboard packets for set of 7 unassembled cardboard geometrical models, showing surfaces of the second order: Ellipsoids of 30 circular sections [ellipsoid II ] & Hyperoloid of 2 sheets [Einschaliges Hyperbolid].
One of four cardboard packets for set of 7 unassembled cardboard geometrical models, showing surfaces of the second order: Ellipsoids of 22 circular sections [Ellipsoid I ] & Hyperboloid of 2 sheets [Zweischaliges Hyperboloid].
One of four cardboard packets for set of 7 unassembled cardboard geometrical models, showing surfaces of the second order: Hyperbolic Paraboloid [Hyperbolisches Paraboloid].
One of four cardboard packets for set of 7 unassembled cardboard geometrical models, showing surfaces of the second order: Paraboloid & Cones [Kegel].
Cardboard box for geometrical models, cream-coloured with black border and black text reading 'Carton-Modelle von Flachen zweiter Ordnung'. Labelled '9. cardboard models 1901-89' in pencil
