Plaster models of surfaces 1

Plaster models of surfaces 2

Plaster models of surfaces 3

Plaster models of surfaces 4

Plaster models of surfaces 5

Geometric models of surfaces 6

These models were made in Germany about 100 years ago.

They have been trimmed by the aid of some chinese students since 1996.

As for the mathematical explanation, please see a home page by N. Takeuchi.