370 Eighth Supplement to Dana’s Mineralogy. 
[In this connection it may be interesting to notice the rasan of Lesage pr 
the chloro-bromids of silver —— tos de Mineralog whe 
_ bromids y. sb n color, from grayish-green or velow, $8 thine “pate 
green. In general the specimens that hav oh raha w color sn more bromine, 
ed consequent rae silver, than those of a nies r pearly green color.” Analyses 
of — e specimens of the yellow variety from the mines of Chafiarcillo gaye Do- 
miey. 
AgCl AgBr Ag Br Cl 
i: 51°00 4900 = 6653 20°85 12°62 
2. §2° 20 = 64°84 20°09 13°07 
3. 51:00 4900 = 6653 20°85 
erat the formula 4AgC1+-3AgBr. No. 2 has the ratio ‘Oh: If or 5:2:38, evn 
the same formula as Breithaupt’s nari 3AgCl-+-2 urs ae gives 
pure, so me of them as translucent as wa 
AgCl AgBr Ag ’ Br -Cl Ratio, 
4, 729 OF] = 7044 1153 1808 9:82°% 
6, 656 844 = 69:14 14°63 16°23 M Be te 
6. 814 186 = 71-94 on 20°14. =. 20: 8:17 : 
" 664 336 = 69-28 9 SSE . 
If we now recapitulate these together with Bit analyses and the analyses of the 
three s _ es of Breithaupt, in the order of the increase of bromine, we have: 
A Cl 
Pearly green, Chafiareillo, (6) 41-94 792 20°14 Domeyko. 
8 
Mikrobrom 69°84 1239 1777 ~~ Miller, 
— ay green, ailing (7), 69°28 1430 1642  Domeyko. 
hafiarcillo, (5), 
23 a! 
Light green, “ 6822 1684 . 1492 Field 
Embolite " 6694 1982 1818 % 
C 6686 2008 13-05 Seren 
cs (2), 6684 2009 1807  Domeym, 
Yellow, “ (land 3), 66:53 2085 12°62 
Megabrom 6419 29649 9:32 Richter. 
Dark eee, Chaniarcill, 6107 «3382 «© 500~—S—s«‘Fel 
n are ten distinct chemical compounds formed by the union Ree 
and 
i=] 
2, 
at SEMEL Da fae be ables ramp Nae os me a 
or more species o (Br, . ihe name abuiole 
Making distinct oa of all arieties of dolomitic “imestone.—¢- ri 
Fercvusomtre [p. 3 —R. Weber has anal zed fergusonite ne 
Greenland (Pogg Pag ale kien ? ci g 
€b Zr x Ce Fe in 
4884 085693 gee1 | 805148085 = 9 he 
Hartwall, prove? 
This, although differing ee from the — — by 
A : 
same right to be hon og <P sorb , but we gene at agai “i 2 
¥ s that at 
mineral to be distinct from the 
