# Curvature centre point surface

### Model 242

### Description

Curvature centre point surface of the triaxial ellipsoid. a) Gypsum; curved surfaces are disjoined; b) Gypsum; curved surfaces are unified. c,d) the same in plasticene.

Showcase of this model is Case number 10

### References

*Separataband M3 im Mathematischen Institut* p. 441.