34 
The American Ceoloi^ist. 
July, 1001. 
AL,0:, was estimated, with others in wliich the total ALO., was 
determined. Also from analyses of several sam])les in whieh 
both soluble and total AIX)., were separately determined in the 
same sample. 
(1)' 
(2)t 
(3)t 
AI2O3 
H2O 
Si02 
TiOa 
Fe203 
Total 
AI2O3 
H2O 
Si02 
Ti02 
Fe203 
Total 
AI2O3 
H2O 
Si02 
Ti02 
Fe203 
Total 
AI2O3 
H2O 
Si02 
Ti02 
FeoOa 
Total 
AI2O3 
H2O 
Si02 
Ti02 
FP2O3 
Total 
(Average) 
AI2O3 
H2O 
w§ 
(1)! 
Per 
Cent. 
Molecular 
Ratio. 
.1.00 1 
.3.04 
Ratio of AI2O3: H2O is 
nearly 1:3 corresponding to 
the formula AI2O3. 3 H2O. 
58.62 574. 
31.44 1.746. 
4.27^ 
3.79 [ 9.57 per cent. 
1.51 ) 
99.63 
58.91 577 1.00] Ratio of AI2O3: H2O is 
\ nearly 1:3 corresponding; to 
3l-''^0 1"55 3.04 J the formula AI2O3 3 H3O. 
3.34^ 
4.18 9.39 percent. 
1.87 1 
99.89 
61. G7. 
29.83. 
4.77 
.604. 
.1,00 1 Ratio of AI2O3: H2O is 
} nearly 1:3 corresponding to 
•••^•658 2.75 I the formula AI2O3. 3 H2O. 
2.95 |-8.10 
0.38 1 
per cent. 
Ratio of AI2O3: H2O is 
nearly 1:3 corresponding to 
the formula A1203. 3 H2O. 
99.62 
60 34 591 1.00) 
30.36 1.686 2.85^ 
4.75-, 
2.39 J> 8.84 per cent. 
1.70 J 
99.54 
Per Molecular 
Cent. Ratio. 
61. 9J 607 1.00 1 Ratio of AI2O3: H2O is 
, ; nearly 1:3 corresponding to 
^^•^' l-"-<^ 2.80 j the formula AI2O3. 3 H2O. 
2.68 I 
3-54 J 7.04 per cent. 
0.82 J 
99.57 
. .596. 
.1.709. 
L.00| 
Ratio of AI2O3: H2O is 
nearly 1:3 corresoonding to 
.2.89 I the formula AI2O3. 3 H2O. 
♦Average of 2S analyses, furnished b.v courtesy of Mk. J. K. Gibrons. 
fAverage of 20 analyses, furnished by courtesy of Mk. j. H. Hawki.ns. 
$Averase of 4 analyses, furnished by courtesy of Mk. B. F. A. Saylor. 
§Average of 4 analyses, analyzed by H. C. White, Univ. of Ga., Athens, 
and'quoted bv T. W. Sf'ENCKR. op. cited, pp. 21.'5-220. 
IIAA'erageof 3 analyses, made by Thomas L. Watson, Lab'y, Geol. Survey 
of Georgia. 
