W. K Hidden— Minerals from North Carolina. 373 



mine, K C, with results differing widely from those of Dr. 

 J.L.Smith. The material tW this analysis was obtained at 

 tin i locality by the writer. The analyses 'by both Mallett and 

 Smith are given below : 



Nb 8 5 47-09 54-12 



Sn0 2 + W0 3 -40 -21 



Y 2 0, 13-46) 24-10 



Ce.O, 1-40 \ 



Di 2 3 +La 2 3 4-00 



CaO 1-58 5-53 



F 2 3 15-15 9-53 



FeO 709 '31 



MnO -08 



H.O 9-55 5-70 



Titanium was carefully sought for by Mallett but none was 

 round; it is essential to true euxenite. I incline to the opinion 

 of Professor Mallett, who, in a late letter to me, stated he had 

 concluded that this so-called "euxenite" was only altered sa- 

 ™''>'«h'U>. Its intimate association with samarskite, its uncrys- 

 talline form, and the varying analyses, point to this conclusion. 



Fergusonite.— Through the kindness of Professor Mallett 

 I am enabled to give an analysis of the fergusonite from the 

 °ew locality discovered by the writer in Burke county, N. C, 

 where it was found to exist quite abundantly in the placers 

 oi the Brindletown gold district. The occurring form is a 

 very acute octahedron, with the basal and hemihedral planes, 

 tolor, brown-black and crystals mostly covered with a gray 

 crust, the faces hardly smooth. Sp. gr. 5-87 (Smith). 



Nb 3 0. 43-78 48-12 



Ta 2 6 4-08 



Hn() o '+\V0, -76 



! .u s ; 



99-6 



Prof. Mallett states further : "That it is 

 any separation of the earths grouped 



