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220 Mineralogical Notices. 



angles. It is associated with iiranochre and also traces of car- 

 bonate of uranium and the sulphate (Johannite). 



2. Ores of Bismuth at Haddaniy Ct, — Bismuthine was no- 

 ticed by Prof Shepard some time since as occurring sparingly at 

 the Chrysoberyl locality of Haddam. _ Bismutite and Bismuth 

 ochre are now reported by him (loc. cit., p. 320) as occurring at 

 the same place, the former in thin coatings upon crystals of Bis- 

 muthine and the latter in a pulverulent form and usually yellow. 



3. Samarskite in Rutherford Co.^ N. C — In angular grains, 

 some weighing a quarter of an ounce, from the washings of one 

 or more gold mines. The form appears from some of the frag- 

 ments to be near that of Columbite. Color velvet black ; streak 

 dark reddish-brown. Opakej H. = 5'5; G. = 5-G9. When first 

 heated in a glass tube, it decrepitates, flies to pieces, glows slighdy 

 after the manner of Gadolinite, but remains of a black color. 

 [No analysis or chemical examination is given.] 



4 Thorite at Danbury, Ct. — This mineral is from Danbury, 

 where it occurs with the Danburite, sphene and angite. It is 

 stated to be either thorite or a new species. It occurs in minute 

 square prisms ( gVth inch long) with truncated edges and having a 

 pyramid at summit. The lower part of the four pyramidal planes 

 forms a separate set of planes inclined at an angle of 160^ to 

 the terminal set; but in the specimen, only one out of the four 

 of the lower set is present and this is not very distinct- Angle 

 of the terminal set (f ), over summit, 98^ ; same on M ( oc-P x) 

 120^. Cleavage imperfect. Lustre resinous; color black. H. 

 5-6. Heated in an open tube yields much moisture having an 

 alkaline reaction. B B. becomes brownish-red but does not fuse, 

 but when most heated has finally a semi-fused aspect. With 

 borax gives a glass colored by iron. [The characters given are 

 insufficient to prove that the mineral is Thorite, as Prof. Shepard 

 observes. The angle 98^ is near the same in rutile, zircon, xeno- 

 time; calculating from this angle, the angle given as 120^ would 

 be 117^ 40'. If 120" is right, 98^ should be 90^, and the form 

 might be cubic] 



Chromic iro7i of Baltiinore. — Analysis by A. Rivot, (Ann. Ch. 

 Phys., Oct., 1S50, [3] xxx, 202.) 



3Pe Si €r Ca gi, Ti? 



30-04 1-96 63-37 2-02 2-21 =99*60 



The oxygen of the peroxyd of iron and alumina is together 

 nearly half of that of the oxyd of chrome. 



Misy from Rammelsberg near Goslar, — Dr. List describes 

 this iron sulphate as follows. (Ann. Chem. u. Pharm-, Ixxiv, 239.) 

 It occurs as an aggregate of small crystalline scales having a 

 pearly lustre approaching vitreous, a dull sulphur-yellow color- 

 These scales, under a lenS; are seen to be rhombic tables with 





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