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 (1912)
Gratacap, L. P. (Louis Pope), 1851-1917 · New York : D. Van Nostrand · leaf 386
uster possessed by its representatives, we find the genus Hyaliisdivided as follows: H. bicolor lolite. H. acutus Axinite. H. rhombohedrus Quartz. H. opalinus Opal. H. vulcani Obsidian. H. sphserulus Sphserulite. H. ferriferus Isopyre. There was thus produced here a mixture of oxides, sub anduni… … DEVELOPMENT OF MINERALOGY 255 The third class of Dana under this system was the Hypogoea,or those so-called buried minerals. In this there were two orders,Pittinea and Anthracinca. Under the first were gums, bitumens,resins, and under the latter coal and graphite. The recent large ex-tension of the…
American Museum of Natural History. Bement Collection of Minerals · Mineralogy
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