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. 322 Fig. 323 PIRATE 15 ii8 A POPULAR GUIDE TO MINERALS Sulphur crystallizes in the orthorhombic system, and thecrystals from Sicily in the cabinet illustrate the orthorhombic habitof the mineral. They are made of pyramids of different inclinationsand of domes. Occasionally so-called hemihedrism is displayedgiving sphenoidal forms (Figs. 317-323). The sulphur depositsof the earth are found in connection with gypsum beds or activeand
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. 322 Fig. 323 PIRATE 15 ii8 A POPULAR GUIDE TO MINERALS Sulphur crystallizes in the orthorhombic system, and thecrystals from Sicily in the cabinet illustrate the orthorhombic habitof the mineral. They are made of pyramids of different inclinationsand of domes. Occasionally so-called hemihedrism is displayedgiving sphenoidal forms (Figs. 317-323). The sulphur depositsof the earth are found in connection with gypsum beds or activeand extinct volcanoes. The sulphur has been produced by separationfrom sulphuretted hydrogen which in burning or oxidation givesrise to a deposit of sulphur, and the sulphuretted hydrogen has inturn come from the decomposition of vegetable and animal organ-isms. Sulphur is found in large deposits in Wyoming, Nevada,Southern Utah, and California. An examination of the sulphur crystals will generally revealupon the large, perfectly formed crystals curiously wrinkled sur-faces. The crystals present brilliant surfaces, the crystals are fre-quently clear and tr
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectmineral, bookyear1912
