ELISHA MITCHELL SCIENTIFIC SOCIETY. 89 



The list is as follows, according to Kerr: 



Albite, Biotile, Linmnite, Thulite, 



Allanite, Columbite, Magnetite, Torbernite, 



Amazon stone. Euxenite, Menaccanite, Tourmaline, 



Apatite, Glassy feldspar, Muscovite, Traninite, 



Arethnnite, Garnet, Phosphuranylite, Uranocher, 



Autunite, Gummite, Rogersite, CJranotil, 



Beryl. Hatch ettolite, Samarskite, Yttrogummite. 



F. A. Genth* cornets this list, and his criticisms are as follow- : 



"Amazon stone, perhaps, doubtful. 



"Autunite (torbernite?), all autunite. 



"Biotite, probably, but I have uot seen it from mica veins, as 

 far as I remember. 



"Euxenite, does uot contain Ti() 2 , and hence is not true 

 euxenite. 



"Glassy feldspar (sanidin), very doubtful. 



" Pyrochlore, in very minute octahedra at the Ray mine, with 

 black tourmaline. 



"Yttroauinmita — 1 do uot know of any analysis having been 

 made; very doubtful. 



"Fluorite, in pseudomorphous granular patches after apatite. 



"Apatite, seems to be fluorapatite. 



" Orthoclase, often completely altered to kaolinite. 



"Quartz, of course." 



Neither Dr. Genth nor myself are able to identify Kerr's 

 arethnnite; it is most likely a lapsus pennce. To this list Hid- 

 den has added fergusonite, which now sells for $5 a pound, 

 monazite and a?schynite(?). Large masses of samarskite are 

 found in some of the mines, a piece weighing 1)4 pounds being 

 taken from the Mart Wiseman mine, in Mitchell county. v This 

 formerly sold, I believe, for $1.50 per pound, but is now offered 

 at 75 cents per pound. The largest piece ever found have been 

 obtained from Mitchell county. 



*Priv. com.. October 3d, 18S7. 



fl). A. Bowman, priv. corn., November otli, 1887 



