402 Domestic. 



Prehnite, in cavities in the greenstone, very fine. 

 Mountain leather, in thin plates, very tenacious when 

 moistened. 



10. Jeffersonite. Professors Vanuxem and Keating 



have pubh'shed in the Journal of the Academy of Natural 

 Science in Philadelphia, an accountof a mineral discovered 

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

 Jeffersonite. It has a great resemblance to Pyroxene, 

 (Augite,) 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, 0.1404 



Protoxide of Iron, - 0.1005 



11. Automalite. — Professor Vanuxem has announced a 

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



12. Notices of Mineral Localities, by Mr. Thomas H. 



Webb, of Providence, R. I. 



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 abovementioned mineral, in 

 great abundance. 



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

 cast also occurs in the same vicinity. 



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 



