402 Domestic^ 



Prehnite^ in cavities in the greenstone, very fine. 

 Mountain haiher^ in thin plates, very tenacious when 



moistened. 



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10. Jeffersonite, Professors Vanuxera and Keating 



have published in the Journal of the Academy of Natural 

 Science in Philadelphia, an account of a mineral discovered 

 in Sparta, N. Jersey, to which they liave given the name of 

 Jeffersonit^. It has a great resemblance to Pyroxene, 

 (Au^ite,) but is conceived to present such differences as to 

 justify arranging it as a new species. Its analysis gives 



Silex, - - 0.6125 



Lime, - - . 0.1463 



Protoxide of Manganese, 0. 1 404 



Protoxide of Iron, - 0.1005 



11. Automalite. — Professor Vanuxem has announced a 

 new locahty of this mineral at Franklin, N. Jersey. 



12. Mtices of Mineral Localities, bi/ Mr. Thomas H. 



Webb, of Providence, R. 1. 



1. Chlorite slate, of a deep green and blackish brown col- 

 our, occurs in great quantities at Smithfield, about ten miles 

 from Providence. It consists for the most of undulated 

 layers, having more or less of a glistening surface, and a 

 slaty fracture. Some parts of it have an earthy structure. 



2. Octaedral crystals of magnetic oxide of iron are found 

 imbedded In some parts of the abovenientioned mineral, in 

 jrcat abundance. 



3. Ligniform ashestus of a brown colour, with a greenish 

 cast also occurs in the same vicinity. 



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4. There Is likewise found here, a shining yellow sand, 

 that appears to have been formed from fragments of decom- 

 posed mica* 



5. Titanium, near the fluor rock, (in Sekonk,) in the 

 crevices of some of the rocks, small irregular yellowish 



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