Supplement to Dana’s Mineralogy. 355 
- Apmros Chlorite-like mineral [p. 297].—Analysi yv. Hauer (Jahrb. 
geol, Reicha, 1 1854, 79, and J. f. pr. Chen, Fait $0) i. agg 
Si 26- k #12027 = Fe 82:91 =Mg a 00 «=r «10-06 = 99°32 
affording the oxygen ratio for the poclanres, peroxyds, silica and w: 
5:417: ors 3°95, or a nearly 5:4:6:4. Von Hauer appears to peel he 
ratio 5 4 and deduces the formula 51 H4+Rs Si*, and remarks on the near- 
ness of the Sater to that of chlorite (Rose), as written by Kenngott. 
e ama occurs in calcite and specular iron Zs minute, lustrous, erystal- 
line lamin, of a degp olive-green color. Rather ly decomposed by muriatic 
[Taking 0 one 5:4:6:4 which the analysis a the a — —— A 
the bases and the silica (excluding the water) is 3:2 
ae fs which would give the ara formula aoe #1) Si eta in she 
R3 an é here to one another as 4:5; or including these proportions (4R*4- 
gays? 
The ratio ‘Adopted by von Hauer, 4, gives for the oxygen ratio of the 
and silica 8/6 = 4:3, which is he ratio ted chlorite (Rose). Thus the liberty 
taken with ree analysis in deducing the ratios is sufficient to transfer the mineral 
from one of these species to the other—p T 
SO eLAN and SCLEROCLASE, von ig nes es —Description and 
analysis by W. S. von Waltershausen (Pogg., xciv, 123):—Occurs with the Du- 
frenoysite in the Binnen Valley in dolomite. at trimetric: a brachydome of 
of the a a 
¢ "Pb Ac. Fe 
I Lead gray; - = 2 393 pA 98556 44564 0424 0448 = 99°922 
IL 405 24658 25°740 47586 0938 -———-== 98922 
atte © ac bic CaN DAD. 20458, DeOT Wate OE a anapees 
Atomic ratio for the base8, arsenic and Bas ge in I, 0:36:061:1-29; in IE, 
038:0555:1-24; in DL ogs: nips 185. As the ratios do not corre 
@simple formula, von Wal reg ng of t 
i aoge ney ae g Pb: SPAS? $3 (A) and 2PbS+As? 83 (®) and clelates 
hat I contains A ai ~<a ratio 3°124:1; IT, in the ratio 1: oe au. i 
ad 1:0-966. "He secs te e Arseno sala to o B. 
— he fo: Pintle of aisiadhitis, except that it contains scueiia in pihes of 
antimony, while Scleroclase (B) differs os Bg: in Jen arsenic from heteromorphite or 
er The ¢ iti rn ar that obtained by Damour in 
his analysis of dufrenoysite [see oo PPT a 
[Zinkenite and Heteromophite are both regarded as trimetrie; yet as far as is 
are mab esi zinkenite has a prism of 120° and 
i in such twins 
given for arsenome- 
refore to need evi- 
urnonite.—p. ] 
0 
Mire [p. 138]. kaa of the atacamite of Copiapo, Chili, by F. Field, 
@. J. “Chen Soc.. vii, 1 
r Cl Sn Cu rl tl ris = CuCl a Cu ee H o17-79 
o1 5624 1800 = 18-00 
ce ae 
wan the mul CaCl 010-4 SHO. § Speci met 57), Cu 55-94, 
honest ert. rrr ima 9 
Soutien [p. 103]—Occurs at Bridgewater, Vermont. 
a Jahrbuch L Reichsanstalt, Wien, 1853, No. 1, 
. ed Mag ve fig Texte, n,, labelled 
ath nies oko et kk ole a 285, making it to contain 27'15 
HR aran ton - Sonn iain Mier PS, No. 11, a very different 
