amy 
wk 
See 
BS tata 
308 F, A. Genth—Contributions to Mineralogy. 
sition, determined by peuripe analysis as follows: Au=24'80, 
Ag=40- 60, Te=35'40 (?). In a communication dated San 
Francisco, "Jan. 4, 1866 (Berg. und Hiittenminnische Zeitung, 
1866, 128), he states that he has neither observed sylvanite x 
tellurid of ‘lead, but besides the principal ore, of whic 
gives his previous results (misprinted 21:80 instead of 24: 80), 
fellurid of silver, native tellurium, copper-nickel (!? Genth) 
pyrites and free gold. 
r. Jas. Ross Siirenbs in his Report on the Mineral Resources 
of the States and Territories West of the Rocky Mountains, 
WwW ton, 1867, published W. P. Blake’s catalogue of March, 
1866, in ‘which the latter states that at the Stanislaus and Me- 
lones mines, “‘very beautiful specimens of gold associated with 
tellurium were taken out of a vein from 6 to 18 inches thick, 
and at a depth of 200 feet from the surface. This telluret has 
a tin-white color and is not foliated like the tetradymite of the 
Field vein in Georgia. Its exact specific character is not yet 
determined.” 
At the meeting of the Academy of Nat. Sciences in Phil- 
adelphia, of August 6th, 1867, I have made some observations 
referring to the } progress of my investigations, and announced 
the occurrence of a new mineral, tellurid of nickel, at the 
Melones mine. 
In a private communication, dated Helena, Montana Terri- 
tory, Nov. 25, 1867, Mr. J. L. Kleinschmidt ‘informs me, that 
I Prof. 
to its true na 
Prof. B. Silliman mentioned at the session of Dec, 2, 1867, 
of the California Acad of Sciences, the occurrence of tellurium 
ores at three new localities—at the Golden Rule mine on the 
separ lode near Poverty Hill, T nohimas Co., where ores sim- 
, Tuolumne Co., where he discovered a very small crystal of 
@. int one of the mines at Angel’s camp he observed foli- 
ium. 
the 5th of Dec. 1 1867, Mr. _ Kleinschmidt writes me from 
* 
4 
