Triaxial ellipsoid with main ellipses
Model 31
Description
Triaxial ellipsoid with main ellipses and a geodetic line running repeatedly through the umbilical points (gypsum)
Showcase of this model is Case number 42
References
Schilling, Martin(Hrg.): Catalog mathematischer Modelle, Leipzig(Verlag von Martin Schilling) 1911, 7.Auflage, No. 214. p. 141.
Separataband M1 im Mathematischen Institut p. 29.