constant length. This area creates the transition between the two aforementioned surfaces ([1, 228, II,4] and [1, 229, II,5]) and corresponds tot he ball for surfaces with constant, positive curvature. The [...] the same. By stud. math. Bacharach in Munich (B). Explanations added. (25x18cm.) Mk. 11.—. [1] Literature: [1] Schilling, Martin (Editor): Catalog of mathematical models, Leipzig (Editing house Martin [...] negative measure of curvature (Hyperboloid type). Gypsum. The object as series II,5 is found at Schilling [1]: A system of parallel geodetic lines is drawn (green), out of which there are 2 (red) that asymptotically
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