Mineralogical Notices. 255 
This last result is the mean of three analyses; the per-cent- 
age relation for the formula is, W 76: 36, Fe 19: 74, Mn 3- -90 = 100. 
Schneider concludes from his investigations that the true view 
of the composition of Wolfram is expressed by the genera form- 
ula R W, paring wolframic or tungstic acid to contain three 
atoms of oxygen 
Native Copper containing Silver from Chili, (M. F. Field, 
Quart. J. Chem. Soc., No. ix, iii, 29.)—A native copper from a 
mine about twenty leagues east of Coquimbo and six from the 
Cordillera of the Andes, afforded Mr. Field for one specimen 
Copper 98-91, silver 1:09=100; for a second, of a whitish color, 
Copper 92:4, silver 7-6=100, 
Native Gold.—Analyses by A. Levol, (Ann. Ch. Phys., [3] 
xxvii, 310 0.) gh ee 
tat Gold. Silver. Copper. Ratio of Au to Ag. 
= Senegal, grains, 8450 15°30. 020 .. 6: 1=Au 846 
2. large scales, 86°80 11:30 0-90 Stes Se 
3. N. Assciitnes grains, 9100 oe 080 Al pde, GES. 
4, California, a A pret 8 “6 6905" O40 - “Wiegee aed 
5. Seneg the ins, 33 “585° Plat. 0-15 18: 36>" 9e8. “¢: 
6. A piece, loe. not given, 9830" So ee 58 Ts : 
' oe 
On the Meteoric Iron of Zacatecas ; by Dr. C. Bergemann of ~ * 
Bonn., (Pogg. Ann., Ixxviii, 406. \—The Zacatecas” meteori *: 
which has been described by Sonneschmidt, Humboldt, an dec ms rs ie 
ers, has been Papen analyzed by Dr. Bergen : hass 
weighs over 20 cwt. It has light steel gray colo 
hackley fracture, Aub the crystalline figures are aa ‘alidte 
pecific gravity according to Bergemann 7-4891, at 
which agrees with the de — by Burkart and ingle 
Analysis gave for its compositi 
Fe Nic Co Cu Mg... Mn © S CéalitileFe Fe, x fet 
85094 9-895 0°668 0630 O:187 trace 0°164 ,0°845 0°334 1649 < 
Dr. Bergemann thence deduces for its actual constitution — 
Nickeliferous i iron, . Edi § ees ’ 9377 5 
hag pyrites, . fle , a 4 
Chromic iron, : 
* son aig 148 
Pisephiuret of nickel and i iron, -. fee gt 
arbon ae 
