CLARKE.] 
SILICEOUS SINTERS. 
299 
M. Same as L, top layer, sinteiy. 
N. Incrustation, platform near Union Geyser. 
O. Blaek coating, the "Minute Man," Norris Basin. 
F. 
G. 
H. 
I. 
J. 
Si0 2 
72.25 
10.96 
.76 
.31 
.74 
.10 
3 55 
92.26 
1.18 
trace 
92. 72 
}, 77 
92. 67 
| 1.42 
83.10 
A1 2 3 
6.02 
Fe 2 3 
trace 
FeO 
CaO 
1.48 
.06 
.56 
trace 
.66 
.80 
MgO 
Na 2 
K 2 
.21 
2.18 
1.66 
"9.02 
.20 
.36 
^.45 
.87 
H 2 
4.97 
4.81 
5.22 
6.73 
C 
NaCl 
trace 
none 
SO, 
.17 
.28 
100. 36 
99.95 
99.86 
100.14 
100. 19 
SiO, 
ALA 
Fe 2 3 
CaO 
MgO 
Alkalies 
H 2 Oatl05°... 
H 2 above 105< 
S... 
93. 60 
1.06 
trace 
.50 
trace 
4.71 
trace 
99.87 
90.85 
| .83 
.46 
trace 
90 
100. 04 
94.40 
} .79 
none 
none 
}*• 
02 
100. 21 
x. 
90.28 
2.82 
trace 
.30 
.07 
nndet. 
1.86 
3.95 
99.28 
O. 
85. 08 
2.65 
1.67 
trace 
^10. 67 
100. 0< 
a Includes H oi organic matter. 
b Whether as S or S0 3 was not determined. 
cLoss on ignition. Water and organic matter. 
