Mineralogy and Geology. 137 
facts with regard to the present condition of these va pnt and ter- 
ritories. His r eport is illustrated with sections of a large number 
of the principal quartz mines, which aid materially in sonpatheiek- 
ing — character and extent of the veins and workings. 
cation, with a sketch of some of the principal mining schools of 
urope. The following estimate of the annual product of bullion 
for 1868 is given by the commissioner 
California, $22,000,000 
Nevada. os. 14,000,000 
Montana, 15,000,000 
Idaho 7,000,000 
Washington and Oregon, 4,000,000 
Ari 500,000 
Colsiads and Wyoming, 3 ,250, 000 
All other sources, 1, 000, 000 
$67,000,000 
being a are of $8,000,000 from the product of 1867; a por- 
tion of this , however, accounted for by the fact that the pre- 
vious domains estimated the bullion from unknown sources at 
$5,000,000, whereas here it is reduced to $1,000,000. For further 
particulars we must refer to the report, which will well repay peru- 
al. We understand that the author’s edition of the report can be 
obtained from D. Van Nostrand, publisher, in New York. 
a transparent Wolfram ; in a letter from Mr. DesCror- 
Aux to J, Lawrence Smith. (Communicated for this Journal.)— 
“T found last sie a Wolfram of Bayonka in the Ural, of which 
the composition is— 
Tungstic acid, 74°32 
Ox xyd of manganese, 20°96 
Protoxyd of 1 iron 211 
ime, oe 1°20 
Silica, ene 
98°99 
Density 7°35. This is above the composition of hibnerite; 
besides, this wolfram is tra: nt in very thin layers, and I was 
en abled to establish that ihe bisectrix of the optical axes is 
notably oblique to the vertical axis about 20°, which confirms my 
previous observation made on very small crystals from the neigh- 
orhood of Limoges, that the form of wolfram is clinorhombic, 
and that the primitive fo rm is a rhombic prism ey an e 
nerite is transparent, and is hyacinth-red i in thin scales. Ba J. BJ 
7. On the Descloizite of the Wheatly mine, Pennsylvania ; 
by J. Lawrence Sairu. “(Communicated for this Journal.)—. 
_ Submitted a short time since some small crystals of the vanadate 
