A popular guide to minerals : with chapters on the Bement Collection of minerals in the American Museum of Natural History, and the development of mineralogy . Fig. 39 Fig. 40 Fig. 41 Fig. 42 (<^^ Fig. 38 Fig. 59 Fig. 63 i6 A POPULAR GUIDE TO MINERALS Chloride of Sodium, and the Nitrate of Strontium, Barium, andLead. Here occurs the tetrohedral pentagonal dodecahedron ( a and b) which is the halved or tetrahedral form of thegyroid. Dr. Wulfif, who studied the crystals of barium nitrate,observes that when crystals are deposited from pure aqueous solu-tions the cube predominate
A popular guide to minerals : with chapters on the Bement Collection of minerals in the American Museum of Natural History, and the development of mineralogy . Fig. 39 Fig. 40 Fig. 41 Fig. 42 (<^^ Fig. 38 Fig. 59 Fig. 63 i6 A POPULAR GUIDE TO MINERALS Chloride of Sodium, and the Nitrate of Strontium, Barium, andLead. Here occurs the tetrohedral pentagonal dodecahedron ( a and b) which is the halved or tetrahedral form of thegyroid. Dr. Wulfif, who studied the crystals of barium nitrate,observes that when crystals are deposited from pure aqueous solu-tions the cube predominates modified by these tetartohedral sodium nitrate was present, crystals were deposited whichresemble regular octahedra, with these faces again, and in solu-tions containing also potassium nitrate and sugar, still more com-plicated crystals arose. EXPLANATION OF PLATE 1. Fig. 34, cube; Fig. 35, octahedron; Fig. 36, rhombic-dodecahe-dron ; Fig. 37, cube and rhombic-dodecahedron; Fig. 38, cube andrhombic-dodecahedron; Fig. 39, cube and octahedron; Fig. 40, cube,octahedron, and rhombic-dodecahedron; Fig. 41, cube and octahe-dron ; Fig. 42, octahedron and rhombic-dodecahedron; Fig. 43,cube and tetragona
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectmineral, bookyear1912
