58 
CONTRIBUTIONS TO CHEMISTRY AND MINERALOGY. 
BULL. 167. 
low). The other samples were imperfectly crystallized and held too 
much foreign matter of uncertain composition to make specific gravity 
determinations of any value. 
Tellurium (Te) 
Gold (Au) 
Silver ( Ag) 
Insoluble 
Ferric oxide (Fe 2 3 ) 
Iron(Fe) 
Sulphur (S) 
Manganese (Mn) 
Calcium (Ca) 
Magnesium (Mg) 
Oxygen, fluorine, and soluble 
silica by difference 
I. Prince 
Albert mine 
57.27 
38.95 
3.21 
.33 
a. 12 
II. Haven 
mine. 
III. CO. I), mine 
47.69 
33.93 
1.47 
5.80 
5.41 
&6. 17 
100. 47 
53.89 
39.31 
.85 
.91 
1.67 
1. 58 (2. 96 FeS 2 ) 
c.23 
.51 
.10 
d.95 
100. 00 
a This was included with the insoluble matter in arriving at the corrected density. 
b Calculated from the Fe to make FeS 2 . 
cAsMn0 2 ? 
d A part of the calcium found in solution was derived from fluorite, which likewise consti- 
tuted some of the insoluble matter in this instance. 
Selenium has been reported in the oxidized ores of the district, 1 but 
it could not be detected in the amount of mineral taken for the above 
analyses. 
Excluding everything but gold, silver, and tellurium and recalculat- 
ing to 100, the following comparison is obtained : 
I. 
II. 
III. 
Per cent. 
Ratio. 
Per cent. 
Ratio. 
Per cent. 
Ratio. 
Te 
57.60 
39.17 
3.23 
2.01 
| 1.00 
57.40 
40.83 
1.77 
2.05 
57. 30 
2.09 
I 1.00 
Au 
1 41.80 
\ 1.00 
J .90 
Ag 
100. 00 
100. 00 
100. 00 
The ratio here obtaining is that for sylvanite and calaverite, but the 
very low percentage of silver shows that the mineral is calaverite. 
Indeed the first analysis agrees almost exactly with Genth's analyses 
F. C. Knight, Proc. Colorado Sci. Soc, Vol. V, 18U4, p. 68. 
