CLARKE.] 
IGNEOUS AND CRYSTALLINE ROCKS. 
39 
Analyses I to P are of rocks collected by B. K. Emerson, and as 
yet undescribed. 
I. Gneissoid granite, north well of Flint's quarry, Monson. Ama- 
dorose. Analysis by W. F. Hillebrand, record No. 1924. 
J. Gneissoid granite, Frawley's quarry, Erving. Tehamose-tos- 
canose. Analysis by George Steig'er, record No. 1941. 
K. Gneissoid granite, Alderman's quarry, Becket. Analysis by 
Steiger, No. 1944. Toscanose-lassenose. 
L. Gneissoid biotite- granite, Wood's quarry, Pelham. Toscanose. 
Analysis by Steiger, No. 1960. 
fci0 2 
A1 2 3 
Fe 2 3 
FeO 
MgO 
CaO 
Na 2 
K 2 
H 2 at 105° . . . 
H 2 above 105 
Ti0 2 
C0 2 ,. 
PA 
MnO 
BaO 
65.02 
18.37 
1.21 
2.06 
1.49 
6.20 
3.96 
.64 
.09 
.42 
.33 
none 
.14 
.09 
trace 
100. 02 
74. 15 
13.35 
1.26 
.53 
.23 
1.92 
2.84 
4.58 
.13 
.50 
.12 
none 
.06 
99.67 
70.62 
15.31 ' 
1.06 
.43 
.29 
1.30 
4.55 
4.01 
.16 
.72 
.29 
.88 
.07 
99.69 
72.45 
13.32 
1.93 
.63 
.44 
1.81 
3.55 
3.86 
.59 
1.51 
.27 
none 
.06 
100. 42 
