The models shown here were ordered from the German company Martin Schilling in the early 1900s by J E A Steggall, the University's first Professor of Mathematics. Most are plaster but some are wire or paper. They represent the three-dimensional appearance of various mathematical equations - some more complex than others!

Left to right: Surface of rotation of constant negative curvature (conical type) *(DUNUC 3082)*

Surface of rotation of constant negative curvature (Hyperboloid type) *(DUNUC 3125)*

Surface of rotation of the Tractrix (Pseudosphere) *(DUNUC 3083)*

Left to right: Surface of rotation of Steiner's Roman Surface *(DUNUC 3084)*

Sphere *(DUNUC 3085)*

Ellipsoid *(DUNUC 3126)*

Left to right: Unduloid *(DUNUC 3086)*

Helicoid *(DUNUC 3087)*

Hyperbolic Paraboloid *(DUNUC 3089)*

Left to right: Catenoid *(DUNUC 3090)*

Union of Ellipsoid confocal and one Sheeted Hyperboloid *(DUNUC 3088)*

Riemann surface with branch point of order two *(DUNUC 3123)*

Left to right: Triply-connected Riemann surface *(DUNUC 3124)*

Torus *(DUNUC 3832)*

Hyperbolic Paraboloid *(DUNUC 3096)*

Half Hyperboloid *(DUNUC 3097)*

Hyperboloid of revolution (ellipsoid cross-section) *(DUNUC 3100)*

Paper models of Surfaces of the Second Order *(DUNUC 3074)*

- Click here to see images from the original Schilling catalogues.
- Click here to find out about exhibitions based on the collection.
- Click here to find out about Steggall papers held in the University Archives.

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