Mineralogy and Geology. 447 
» According to M. Domeyko, the ore consists of a mixture of galena, 
ion pyrites, blende and gray copper, in amorphous quartz as the 
matrix. 
ee aeevcnne. EAeRSena found in a chrysocolla (J. f. pr. Chem., 
vy, 488) 
i Ou Fe Oa g 
g 42°32 1:63* 1-76 1-06 20°68 
n, 16-9 85 — 050 0°42 18°31 
Formula, Cu* Si?+-6H. 
Copper ores of Adelaide, Australia.—The following ores are re- 
ported as coming from different mines near Adelaide, Red Copper 
ore, Azurite, Malachite, Chrysocolla, Atacamite, with specular iron, 
Galena and native Bismuth. The last is accompanied with Bismuth 
ochre and Iron ochre in a red flinty rock.—A. L. Sack, in Jahresb. 
nat. Ver. Halle, 1851, 57. 
Arsenical Nickel—An ore from Allemont afforded Rammelsberg 
(J. f. pr. Chem., lv, 486) : 
s 
As Ni Fe 
229 eye! 18°71 6:82—G=6-411 
Chloro-bromid of Silver from Chili.—This ore afforded Domeyko 
(Elementos de Mineralogia, 1845, 203), in three trials: 
Chlorid of Silver, , 51-0 52'8 51:0 
Bromid of Silver, 7 49-0 47-2 49-0 
lized in shining cubes and cubo-octahedrons, having an asparagus or 
==6'31—5-43. The fo i 
lo. 
Mr. P. Yorke has recently analyzed similar erystals (Quart. J. Chem. 
Soc., iv, 2) from Chili, and obtained, Chlorid of Silver 53-2, Bromid of 
Silver 46-8. Whence he has the formula 3Ag Cl+2Ag Br=Ag Ci 
53:7, Ag Br 46-3. Specific gravity 5°53. 
Cinnabar.—J. Scnasvs has investigated the crystals of this mineral, 
and obtained for the fundamental rhombohedron, 92° 37’ 6”, the ineli- 
nation of the faces on the terminal plane (OR) being 127° 5’ 45”. ° 
angle of the rhombohedron —2R is 71° 47 10”; —3R=110° 7’ 44”; 
=101° 56’ 30”. 
“ Cinnabar of California ; by A. Beatzy.—Specimens of this cinna- 
bar afforded the specific gravity 4°410, and the composition : 
: 70°13 
Quicksilver, . . 69°36 °] 69-90 
Sulphur, . soi ete 11-26 11-29 
Irom... 02% hao rele Gee seer 1-23 
ime, . 1-40 eis 1-40 
z 0-61 —_—— 0-61 
Magnesi s rs 0-49 —- 
ake 14°30 14-52 1441 
; * Peroxyd of iron and alumina, 
