* This model relating to the Regular Partition of three-dimensional spaceIt has a parallelogram and six triangles for faces. Several line segments are indicated. This is one of a series of models designed by A. Schoenflies in Göttingen to illustrate the regular partition of space. Schoenflies designed “stones" which could be arranged into larger blocks. It was first published by Brill.
* *(метка Р1233)*