Sixth Supplement to Dana’s Mineralogy. 353 
Si wi ° -Pe Wee > Oa V ign. 
4738 5°52 3°85 7-89 0-10 19°10 i 8 0-432 99-53 
47-52 8-13 5°83 T77 0-40 18°25 12°76 —=100°66 
51°12 He 0-95 5:45 4 - = po 12:82 —= 99°89 
50:03 2:36 “6. 13-48 
Aiwnicous ea Analyses by pede (mean of results f for each): 
1. Pale-c ~wer seg Hest oat te sp G.=3:'059. 
argas; G.= 
3. Bluish gray “rece, nde from Mon nroe, Orange Co., N. Y.; G.=38" ; 
4, pineted, from Saualpe, Cari nthia : 6 =3:102; T: J=124° paige 
. Black, ferruginous, from near Peagulowsk Urals ; G.=3'214, 
6. Ibi argas; G.= 215. 
1. Tbid., A Arendal; G.=3-276. 
. Ibid., Philipstadt, Wermlands G.=3-278; ZT: =124° 30’. 
9. Ibid d., Bre evig; G.=3-428 ; ——+ 
10, Ibid, F redericksvarn ; dats 298i: J: ‘J=124° 7. 
11. Tbid., Vesu UVIUS ; ar 
12. Ibid, Hirtlingen ; Gant 270. 
13. Ibid., Cerno osin, in Bohe 
14. Ibid., Honnef, in Siebengebirge: a= 21. 
15. Ibid, sereippscglay ib.; 
2 
of 
@ 
“Mtn 
Se | 
& 
a 
Rade be 
SSkVes 
DBI 
RIBRS 
Qn | oo 
a R° 
—T 
aahdl # 
SSSSa8 
aoa eal 
& S 
seearatkoe 
SEBS 
RER 
to 
a 
° 
% 
il 
& 
2 
4S 
io 
os 
we 
es 
se 
ee 
835 
ene 
8 
—] 
B 
e 
os 
— 
— 
a 
vo 
a 
a 
wwcow- 
a 
w 
a 
& 
° 
& 
| 
S 
3 
i101 4297 631 662 21-72 113 968 362 
0:80 8-00 11-04 103 1026 11:51 
13:38 1:85 1 : 
Bae te a 
& 
2 
3 
14 
“ 101 4252 1100 830 912 
«159 dro, jot 833 1073 : 79 079= 
0-19 39.62 1692 1028 767 024 1265 1132 112 218 048= 99-67 
* Ti 1-01 — + Ti trace. 
’ 
Rammels oxygen ratio of the bases, and silica; of the prot- 
a ee ; of ne ae on the aon side pry _ oe 
aide ai ane other, silica . yar et rand concludes that the last (which 
1, the following numbe the yee oye 2, 2°06 ; 
2, 200; 3, 2-15: 4 262: 5 ‘ “eee: 6 2 ae Sod pet 9, 2:00: 10a, 1-702 
105, 175; 11, 2:20; 12, be 18, 711, sie 216; 
bisilicates and the aluminous s 
are bisilicates (or have the ratio 1 58 pe ee epg ape 
por sw ef of Vilate near 
Sones p07) of} a tn tittviog bs (Ain. dat Ch. ot do 
ov. XXVI, No. 78.—NOV., 1858. 
