. Annual report of the regents of the university on the condition of the State Cabinet of Natural History and the historical and antiquarian collection annexed thereto. of columbite have been found by Dr. Leonard, associatedwith chrysoberyl, at the Greenfield locality. Descloizeaux has published under the crystaline forms of cymophane,a detailed description, with plates, and M. Biot has made some experi-ments upon the structure of this mineral in regard to polarized light.^7272. de Chim, et de Phys. xiii, 329, 335. ORDER IV. ZIRCONIA. ZIRCONITE. (Mineralogy of New-York, page 378.) This mineral
. Annual report of the regents of the university on the condition of the State Cabinet of Natural History and the historical and antiquarian collection annexed thereto. of columbite have been found by Dr. Leonard, associatedwith chrysoberyl, at the Greenfield locality. Descloizeaux has published under the crystaline forms of cymophane,a detailed description, with plates, and M. Biot has made some experi-ments upon the structure of this mineral in regard to polarized light.^7272. de Chim, et de Phys. xiii, 329, 335. ORDER IV. ZIRCONIA. ZIRCONITE. (Mineralogy of New-York, page 378.) This mineral has been found in New Sweden, Essex county, (Em-mons* Rep. Geol., 2d Dist., p. 2S6 ;) Putnam Valley, Putnam county,(Fountain;) and on the farm of Mr. Cleaveland in Diana, Lewis the latter locality it occurs rarely, but the crystals, although small,are very brilliant. F. B. Hough, who quotes Mr. Wilder, Sill. Jour.,Jan., 1S48. I have also received specimens from Mr. Charles Thomas, whichwere obtained from a mine of magnetic iron ore, near Port Henry, Es-sex county. In form and color the crystals resemble those from theHall mine in the same county. 147. According to Mr. Dana, the crystals from Johnsburg, in Warrencounty, sometimes have a tesselated structure. The accompanying fig-ure represents the appearance of one of the crystals. Sill. Jour., xlvi., p. 36. CLASS VII. METALLIC IRON. (Mineralogy of New-York, page 382.) Since the publication of my Mineralogy, several interesting facts inregard to the occurrence of native iron in this State have been madeknown. Dr. Emmons has described a specimen which he calls native iron,said to have been obtained from the vicinity of Catskill, in Greenecounty. It is in the form of laminae, which are about one-thirtieth of aninch in thickness. Sp. gr. 6 • 58. It dissolves completely in warm sulphuricor muriatic acid, and when nitric acid is added, ammonia precipitates theperoxide of iron. It is strongly attracted by
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