OF MODELS OP CRYSTALS, ETC. 207 



2412. The Crystal Cube, containing the Octahedron and two Intersecting Tetrahedrons, 



3-inch., with an explanation . . . 076 



2413. The Cube, containing the Octahedron, Intersecting Cube, two Intersecting Tetra- 



hedrons, and Cube-octahedron, with the Macles's Section, 3-inch. 10 6 



2414. The Cube, containing the Octahedron, Intersecting Cube, Rhombic Dodecahedron, 



Trapezohedron, and Tetrahexahedron, 3-inch. . . 15 



2415. Models in Wood, illustrating " Dana's Manual of Mineralogy," f -inch, 12s. ; 



li-inch. . . . . . . 110 



The small sizes are in white wood, and the larger in mahogany. 



2416. MODELS IN WOOD, to illustrate the section on Crystallography and Mineralogy 



in Orr's " Circle of the Sciences," 1-inch, 10s. 6d. ; l|-inch . 18 



2417. MODELS IN WOOD, to illustrate Ansted's " Elementary Course of Mineralogy," 



|-inch, 10s. 6d. ; 11-inch. . . . . .. 110 



1. REGULAR: Cube-octahedron, Octahedron, Cube, Khombic Dodecahedron, Tetrahexahe- 

 dron, Pentagonal Dodecahedron, Tetrahedron, Ex-octahedron, Ex-cube, Fluor Spar 

 Native Copper, Grey Copper. 



2. SQUARE PRISMATIC : Short Square Octahedron, Long Square Octahedron, Tin Ore, 

 Zircon, Zircon, Idocrase, Zircon. 



3. HEXAGONAL : Hexagonal Dodecahedron, Rhombohedron, Quartz, Calc Spar, Hexagonal 

 Prism. 



4. RHOMBIC : Long Rhombic Octahedron, Sulphur, Topaz, Heavy Spar, Prehnite, Sulphuret 



of Antimony, 



5. OBLIQUE : Oblique Rhombic Octahedron, Malachite, Gypsum, Pyroxene. 



6. DOUBLY OBLIQUE : Doubly Oblique Rhombic Octahedron, Sulphate of Copper, Axinite. 



TWIN CRYSTALS OR MACLES : Staurotide, Gypsum. 



2418. Models in Wood, to illustrate Dr. Pereira's " Materia Medica," 1-inch, 15s. ; 



11-inch. . . . . . . 1 10 



2419. MODELS IN WOOD, to illustrate Fownes's " Elementary Chemistry," 1-inch, 6s. ; 



U-inch. - . . . . 10 6 



2420. MODELS or DIAMONDS, in glass, the Koh-i-noor or Mountain of Light, Star of 



the South, Nassuck or Indian, Pitt or Orleans, Maximilian or Austrian (yellow), 

 Great Kussian, George the Fourth or Blue Diamond, etc., each 080 



2422. WIEE MODELS. The six prisms with their contained forms, in wire, uniform 



with the 8-inch, cube . . . . . . 550 



2423. THE Six PEISMS, in wire, with their axes, uniform with the 6-inch, cube 110 



2424. DITTO, with movable Octahedrons, etc., in wood, coloured . 220 



2425. Models in Wood. Geometrical solids. The Platonic or five regular solids. The 



Tetrahedron, Cube, Octahedron, Dodecahedron, and Icosahedron, with a de- 

 scription, 1-inch, Is. 6d. ; 1^-inch., 2s. 6d. The same forms in wire, 4-inch., 

 7s. 6d. Short set, 1-inch, 6s.; li-inch., 10s. 6d. Complete set, 1-inch, 

 10s. 6.; H-inch. . . . . . . 18 



COMPLETE SET. Tetrahedron, Hexahedron or Cube, Octahedron, Rhomboidal Dodecahedron, 

 Trapezohedron, Tetrahexahedron, Excube, Cuboctahedron, Exoctahedron, Triexocta- 

 hedron, Pentahedron, Dodecahedron, Icosahedron, Tricacontahedron, Hexacontahedron, 

 Exdodecahedron, Icosadodecahedron, Exicosahedron, Acute Rhombohedron, Obtuse 

 Rhombohedron, Scalene Dodecahedron, Bipyramidal Dodecahedron, Tetradodecahedron, 

 Pentagonal Dodecahedron, Trapezoidal Dodecahedron, Triangular Prism, Triangular 

 Pyramid, Quadrangular Pyramid, Hexagonal Prism, Hexagonal Pyramid, Cone, Sphere, 

 Cylinder, 



