26 ANALYSES OF ROCKS, U. S. GEOLOGICAL SURVEY. [no. 228. 
NEW HAMPSHIRE. 
A. Elaeolite-syenite, Red Hill, Moultonboro. TJinptekose. De- 
scribed by Bay ley in Bull. Geol. Soc. Amer., vol. 3, p. 231. Contains 
elaeolite, augite, hornblende, biotite, sodalite, albite, and orthoelase, 
with accessory apatite, sphene, magnetite, and an occasional zircon. 
Fibrous decomposition products are also present. P. R. C. 203. 
B. Mixed albite and orthoelase from A. 
C. Nepheline (elreolite) from A. Analysis by W. F. Hillebrand, 
record No. 1321. The mixed nepheline and feldspar were treated with 
dilute hydrochloric acid, and the residue was extracted with sodium 
carbonate solution. C represents the soluble part and B the insoluble. 
D. Camptonite, Campton Falls. Analysis by L. G. Eakins, record 
No. 1298. Described by J. P. Iddings in Bull. 150, p. 239. Contains 
hornblende, plagioclase, orthoelase, augite, iron ore, biotite, apatite, 
pyrite, and a mineral which appears to be analcite. Also variable 
calcite, serpentine, and chlorite. P. R. C. 92. 
E. Quartz - porphyry, Pemigewasset. Toscanose. Analysis by 
Eakins, No. 1298. 
A. 
B. 
c. 
i). 
E. 
Si0 2 
59. 01 
66. 85 
45.31 
38. 45 
65.02 
A1 2 3 
18.18 
19.50 
32.67 
L9.68 
17.93 
Fe,0, 
1.63 
3.65 
} .„ 
4.01 
11.15 
4 69 
FeO 
.17 
MgO 
1.05 
trace 
.16 
6. 65 
1.24 
CaO 
2.40 
.11 
2.00 
9. 37 
1.34 
Na 2 
7.03 
7.44 
12.60 
2.77 
3.04 
K 2 
, 5.34 
5.80 
5.70 
1.72 
5.98 
H 2 at 100° 
.15 
.50 
| 1.49 
} .86 
H 2 above 100° 
.31 
1.56 
Ti0 2 
.81 
P 2 5 
trace 
MnO 
.03 
trace 
.08 
trace 
.12 
trace 
. 11 
SrO 
BaO 
.07 
none 
Li 2 
C0 2 
4.82 
99.98 
100. 21 
100. 00 
100. 11 
100. 38 
VERMONT. 
1. ROCKS OF MOUNT ASCUTNEY. 
Described by R. A. Daly in Bull. 209. Analyses by W. F. Hille- 
brand, record Nos. 1621, 1657. 
