435 
i. 
2. 
a. 
b. 
Silica 
. 86.03 
84.78 
79.34 
Water and organ, subst. 
. 11.52 
12.86 
14.50 
Sesquioxide of Iron . . 
Alumina 
' | 1.21 
1.27 
1.34 
3.87 
Lime 
. 0.45 ' 
0.27 
Magnesia 
. 0.40 
> 1.09 
0.26 
Alkalis 
. 0.38 ' 
0.42 
3. 
88.02 
7.99 
| 2.99 
| 0.64 
0.40 
4. 
86.80 
11.61 
slight indi- 
cation. 
slight indi- 
cation. 
I. Pattison (Philos. Magazine 1844. p. 495) and 
II. Mallet (Philos. Magazine 1853. V. p. 285) give the following analyses 
of the silicious deposits on the hot springs of Lake Taupo, without, however, 
specifying the localities. 
i. 
II. 
Silica 
77.35 
94.20 
Alumina 
9.70 
1.58 
Sesquioxide of Iron . 
3.72 
0.17 
Lime 
1.54 
Indie. 
Chloride of Sodium . 
— 
0.85 
Water 
7.66 
3.06 
99.97 
99.86 
specif, grav. 
1.968 
2.031 
