# Oblate rotation ellipsoid with a geodetical line

### Model 33

### Description

Oblate rotation ellipsoid with a geodetic line and envelope of all geodetic lines going through a point (gypsum)

Showcase of this model is Case number 42

### References

*Separataband M1 im Mathematischen Institut* p. 25.

A. v. Braunmühl(1879). *Ueber Enveloppen geodätischer Linien. (Mit 1 lithogr. Tafel)*. Math.Ann., 14. Online version