128 B. Silliman—Mineralogicai Notes 
ing District, Beaver County, Utah, about ten miles west of 
Beaver City. The main vein, which is said to be about six 
feet in thickness, contains also bismuth ocher or besmite, Bi, 
staining the surface greenish yellow (a sign by which the vein 
has been traced at intervals, it is said, for about 2000 feet), and 
bismutite (hydrous carbonate of bismuth), Biéf, in yellowish- 
gray masses inclining to siskin-green. These last two species 
are due, no doubt, to the oxidation of the bismuthinite. 
These three species sometimes form masses of considerable 
size, but more commonly the sulphid occurs alone in a gan 
of almadin garnet of a hair-brown color, with black horn- 
blende, heavy spar and quartz. Yellow pyrite exists in small 
quantity in the gangue, and by its mesneson has furnished 
masses of iron oxides. No arsenical ores could be detected in 
the samples which have fallen under my observation, nor 
the blowpipe detect either lead, antimony or copper. 
Hitherto bismuthinite has been a rare species in N. America, 
and I do not know that it has before been found in quantity 
likely to give it a commercial value.* In the Beaver vein, the 
metal is said to form about five per cent of the mass. 
When this locality is properly opened for mining we may 
hope to obtain an abundance of good mineralogical specimens 
of these several species. I am indebted to Mr. J. B. Meader 
of Salt Lake, and to Col. Head of San Francisco, for the spect 
mens from Beaver, which I have examined. 
3. Wulfenite—In a former communication (this Journ., IU], 
iii, 195) I pointed out the absence, so far as observed, of phos 
phates among the mineral species found in the Wahsatch Range, 
and the existence of molybdic acid as wulfenite in its place. 
Further observation has confirmed this statement. Ina su 
quent visit to that region, and more recently, I have received 
from Major Wilkes, of Salt Lake City, wulfenite from the Em- 
pire mine, Lucin District, Box-Elder County, Utah, in the Wab- 
satch Range, which for beauty is rarely equalled by the same 
species from any known locality. The crystals are thin tables 
20 to 30™m, broad, of a pure yellow color set on a deep brow? 
iron ochre, and making splendid cabinet specimens. be 
4. Orpiment and Realgar.—These two species are found with 
galenite in a vein known as the “ Lucky Boy mine,” in Butter 
field Cafion, which is in the Oquirrh Range on the west side of 
Jordan Valley, Utah. 
rceite,—This borate of lime, which I received from Mr. 
Thomas Price, in San Francisco, in March, 1872, has bee? 
noticed by Mr. Chase, and its mode of occurrence and pro ble 
origin described by him in this Journal (III, v, 287), accony 
* T have observed it in minute p ystals in th well-known chrysobery! 
locality at Haddam, Conn. 
