Geometric Model Central Surface

* This white plaster model of a central surface has a rectangular base and a central peak. There are no curves indicated. The model was designed by L. Schleiermacher under the supervision of Ludwig Brill at the technical high school in Munich. It shows the locus of centers of principal curvature of an elliptic paraboloid. A tag on the base of the model reads: Centralfläche des Paraboloids. (/) Verl. v. L. Brill. 1. Ser. Nr. IIb. * *(метка 32)* Source: Objaverse 1.0 / Sketchfab