No. 75.] 



147 



CACOXENITE. 



(Mineralogy of New- York, page 402.) 



This mineral is liable to decomposition, even in the closed drawers 

 of a cabinet. My specimens from the Sterling iron mine in Jefferson 

 county, at the end of 2 or 3 years entirely lost their silky lustre, and 

 were converted into a dull yellowish powder. 



, BABINGTONITE. 



(Mineralogy of New- York, page 407.) 



The composition of this mineral as determined by Dr. R. D. Thom- 

 son is as follows: silica 47*46; protoxide of iron 16*81; protoxide of 

 manganese 10*16; alumina 6*48; lime 14*74; magnesia 2*21; wa- 

 ter 1 * 24. This analysis approaches one by Bonsdorff of a black horn- 

 blende from Nordmark and Pargas, the magnesia being replaced by 

 manganese in Babingtonite. Phil, Mag. Anru^ xxvii., 123. 



ZINC BLENDE. 

 (Mineralogy of New- York, page 408.) 



The occurrence of this species in the calciferous sandrock, one or two 

 miles N. E. of Glen's Falls, in Warren county, is mentioned by Dr. 

 Emmons. o7i GeoLj 2d Dist.^ p. 180. 



GALENA. 



(Mineralogy of New- York, page 412.) 



Various crystalline forms of galena occurring at the Nash vein in 

 St. Lawrence county, are noticed by Dr. Emmons. Rep.y on GeoL^ 2d 

 Dist., p. 356. 



For some remarks of the singular crystals of this mineral found at 

 Rossie, St. Lawrence county, by Mr. J. E. Teschemacher, see Phil 

 Mag, ^ Ann., xxv., p. 232. 



The crystals of galena from Rossie are sometimes very singularly 

 constituted. Alger introduces a figure representing a crystal of the 



