444 Scientific Intelligence. 
copper is deposited. In his trials, there were occasional deposits of 
copper in crystalline bunches; the a of which obtained was little 
more than one-fiftieth of an inch in diameter. He observes that with 
100 grains of the rock, 3 or 4 deposits of copper can usually be o 
tained. The basalt of the Gianv’s Causeway affords this evidence of 
the presence of native iron, but less so, than the Slievemish basalt. 
‘he same result would be produced, if the vo or cobalt were 
present in fine grains; but Dr. Andrews considers this very improbable. 
The same basalt afforded, on pe i a examination, augite, mag- 
etic iron, pyrites and a colorless glassy mineral. 
The metamorphic rock of eet tal le clay of the Lias, 
somewhat resembling Lydian stone in external appearance—under a 
microscope is everywhere thickly studded with perfect cubes of pyriles, 
20 of which could often be counted in the space of 1-100th of an inch 
square ; they measured each way about 1-2000th of an inch. With a 
enenels minute particles or crystals of magnetic iron were found in 
the same rock. 
On MickeliGonaia iron pyrites, from Kearney Ore Bed, Gouverneur, 
St. Lawrence Co., N. Y.; by Prof. C. U. Suerarp, (Proc. Amer. As- 
soc., vi, (Albany meeting :) p. 230.)——-This mineral occurs in botryoidal 
concretions, somewhat radiated structure and pale bronze color, at the 
same place with Millerite. H.—=5:5. G.=4-863. The presence of 
nickel was ascertained, but not cy eo al 
Limonite containing Vanadium.—A limonite (bohnerz) from Staats- 
wald Hardt, ethics contains according to Dr. A. Mille r (J. f 
pr ene lvil, 124) about 0-05 p. c. of chrpune acid and bt over 
of vanadic acid, 
On a Tron irs of the Lake Superior Region, etc. —Messrs 
TER and Wuirney’s Report on the Lake Superior Land Dewiel, Part 
Il, 1851, p. 50-77. Ores with a metallic lustre and appearance of pu- 
rity from the Jackson’s Company location afforded 
1. Massive. 9, Slaty. 
Oxygen, 29:46 29-09 
ron, 68:07 69:09 
Insoluble, 2-89— 100-42 1-64=99'82 
It is a mixture of the peroxyd and meer oxyd. <A fine grained 
ore, from the Marquette Company’s ore bed afforded iron 70°22, OXY- 
n 29°53, insoluble 0-°20—99-95 ; ebrrelpending to peroxyd of iron 
58, magnetic oxyd 9°17, silica 0:20. Some of the ores are pure per 
oxyds, but many are mixtures of the two oxyds. 7 
_ Tron ores in the Des Moines Coal Fields.—Dr. D. D. Owen has nA 
cted i carbonates of iron of Des Moines, a 
a ee oscopic > pinguas which occur in it. 
— a v, [Cincinnati meeting,] 47.) de 
a ore from India; by Dr. A. J. Scott, (James 
w Phil. J., 1852, liii, 277.)--The ore from Vizianagram “ 
bh vce a =450. Breaks with difficulty ; powder dark prow 
ake 
Si le HK  RedoxotMo ..0 
$300 12910 $389 0539 13-786 1-864==99°735 
