Ald Scientific Intelligence. 
gravity 2935; hardness inferior to calc spar. It is but slightly at- 
tacked by acids. It contains silica 44°06, peroxyd of iron 37-84, lime 
6°58, magnesia 5-42, oxyd of copper 1.36, water 4°70—99-96 
3. Antimoniate of Lead; by M. Hermann, (Journ. d’Erdmann, 
xxxiv, 177.)—-This ore is from the district of Nertschinsk in Russia. 
It is amorphous, with a compact texture and resinous lustre ; color gen- 
erally sulphur yellow, sometimes grayish, green or black; specific 
gravity, 4°60—4-76, It consists of antimonic acid 31-71, oxyd of lead 
61:83, water 6-46—Pb?Sb+48. 
4. Native Titanium.—It is reported by Mr. Rogers that native Tita- 
nium in cubes of a copper-red color has been found in the mines of 
Merthyr-Tydrill, in Cornwall, similar to those detected in the scoria of 
the furnaces at the same locality. It appears that in 1794, similar crys- 
tals were sent to Hairy, who considered them pyrites. 
5. Loxoclase ; by A. Bretruavrr, (Phil. Mag., Aug., 1846, xxix, 150, 
from Poggend, Ann.)—Loxoclase is near feldspar in its characters, and 
comes from Hammond in the state of New York. It is distinguished 
by having an oblique cleavage parallel with the long diagonal 
though not always very distinct, and from this its name is derived. 
Hardness a little above ordinary feldspar; specific gravity 2°609— 
2°620 ; color yellowish gray, whitish and bluish gray. It has the gen- 
eral crystalline form of common feldspar, with the angle M : T=120° 
15’. It fuses-before the blowpipe with difficulty and shows in the outer 
flame an intense soda reaction. Composition, according to M. Plattner, 
silica 63°50, alumina 20-29, oxyd of iron 0-67, potash 3°03, soda 8°76, 
lime 3-22, water and me of silicon 1:23. It occurs with pyroxene, 
graphite, and calc sp 
6. Digenite and E Ctipr stabs by M. Brerruavrt, (Poggend. 
Ann., Ixi, 671.)—These are two ores of copper from Chili. Digenite 
is a massive sulphuret of copper having a metallic lustre, a dark lead gray 
color, and giving a black streak. Hardness between 2:5 and 3:25 of 
Breithaupt’s scale. Specific gravity 4680. The same mineral has 
been ‘found near Sangerhausen in Thuringia having the specific 
gravity 4-568. Composition ; copper 70-20, silver 0°24, sulphur (loss) 
29°56 ; formula, Gu+40u neatly. Cuproplumbite has the cleavage of 
pilots; a metallic lustre, black streak ; specific gravity 6°42 ; fuses 
easily. Composition, sulphuret = copper 24°45 ; iit of lead 
74-98, sulphuret of silver 0, 57-=Gu-L2Pb. 
7. Vanadate of Copper ; (L’Institut, No. 525, p. 68. )—This ore has 
been met with in the Ural, associated with sulphuret of copper, ime 
: and Malachite: een also in remit 
consi ow color and pearly 
| 
| 
| 
