126 B. Silliman—Mineralogical Notes 
om one point of view may be regarded as a diatomic radical 
or residue, and those who justify the use of trivial names 
their convenience may find the name “ Croceocobalt”’ expres 
sive and appropriate. 
(To be continued.) 
Cambridge, June 16th, 1873. 
Art. XVI.— Mineralogical Notes on Utah, California and Ne- 
vada, with a description of Priceite, a new Borate of Lime; by 
B. SILLIMAN. 
1. Enargite, 3€u S+As?Sb3.—This hitherto rare mineral ex- 
ists in two or three localities in a district of Southern Utah, 
known as the Tintic District, about eighty miles south of Salt 
Lake City. The localities are, (1) the Shoebridge Mine, (2) the 
Mammoth vein, Eureka Hill, East Tintic, and, (8) the wie 
Mine, East Tintic. All these localities occur in metamorphi¢ 
crystalline rocks of the granitic family. ; 
The Shoebridge locality furnishes finely crystallized spect 
mens, associated with octahedral pyrite. e vein in which t 
is found fills a fissure about four feet wide in granitic rocks. 
This vertical fissure i§ filled to the depth of about 80 feet from 
surface with enargite mixed with pyrite. The whole mass 
regarded as a silver ore. A sample of the ore made up from 
such stock as I had in hand yielded to fire assay 269°25 oz. troy of 
silver, or $347.84 to the ton of 2000 ibs. ; this is equal to 0°84! 
per cent of silver, which is considerably above the average 
value of the vein. Below the depth of 80 feet, the character of 
the vein changes, as I am informed by one of the owners, MP 
muel T. Hatch, of Salt Lake City, to a vein of argentiferous 
galena, carrying some antimony. In examining many hun red 
* Journal fiir prakt. Chemie, Lxxii, 218. 
