Page:Collier's New Encyclopedia v. 03.djvu/256

LEFT CRYSTALS 212 CBYSTALS CRYSTALS No. 1, Octahedron; No. 2, Hexahedron: No. 3, Rhombic Dodekahedron ; No. 4, Tetra-Hexahedron*. No. 5, Triakisicosahedron ; No. 6, Icositetrahedron ; No. 7, Hexoctahedron ; Nos. 8 and 9, Combina- tion of Hexa and Octahedron ; No. 10, Combination of Hexahedron and Dodekahedron ; No. 11, Combination of Octahedron and Dodekahedron ; Nos. 12, 13, 14, 15 and 16, Various combinations of regular systems ; No. 17, Derivation of Tetrahedron from an Octahedron ; No. 18, Trigonal Dodekahedron; No. 19, Deltahedron ; No. 20, Hexakisoctahedron or Hexoctahedron; No. 21, Pentagonal Dodekahedron ; No. 22, Dyakisdodekahedron or Diploid ; No. 23, Tetragonal Protopyramid ; No. 24, Tetragonal Deuteropyramid ; No. 25, Ditetragonal Pyramid ; No. 26. Tetrag- onal combinations.