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 . cimens are embraced in Nos. 1747 to 1771,amongst which is the famous elongated octahedron (No. 1757), saidto have been sold to Dr. Foote for $150, and which has been in-terpreted as a distorted trigonal trisoctahedron with diploid andpyritohedron. From Gilpin Co. Colorado are a fine series of lus-trous pyrites; No. 1804 a flattened cube with intersecting smallerindividuals, delicately striated; and then the superb d faces on thecube; an
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 . cimens are embraced in Nos. 1747 to 1771,amongst which is the famous elongated octahedron (No. 1757), saidto have been sold to Dr. Foote for $150, and which has been in-terpreted as a distorted trigonal trisoctahedron with diploid andpyritohedron. From Gilpin Co. Colorado are a fine series of lus-trous pyrites; No. 1804 a flattened cube with intersecting smallerindividuals, delicately striated; and then the superb d faces on thecube; and the beautiful individuals from Montezuma, which attainsuch complex development, as in No. 1823; the o and d combinationin 1828, and the faultless groups 1836, 1837. From Pyrite to the end of the sulphide and arsenide series oc-curs the bewildering succession of species so well known to miner-alogists, and amongst which in the Bement Collection mineral gemsare liberally distributed. Here are placed the wonderful RaddusaHauerites, excellent Smaltite from Saxony, the Swedish Cobaltites,an unusual cubical Gersdorffitc, beautiful Ullmannites, crystals of r. w Ti ^ H — ^ t-H , /, > o >i S u -2 :: 03 ,^ ^ - «^ S ~i -^ oU
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectmineral, bookyear1912
