Quick Sand, 83 
100 grains of quick sand from Hadley, after ignition, to drive 
off the water and organic matter, yielded. 
Silica, 7r008 
Alumina .... 16;706 ) g^.^^g 
Oxide of iron, . . . . b >i{)d ) 
Lime, with some sulphate of lime, 3*336 
Magnesia, .... - 1*552 
Traces of magnesia, and potash and loss, 1*196 
* 100-000 
These three analyses give nearly as much alumina and iron as 
are found in ordinary clays. 
Bradford, 
Northfield. 
Merrimack River. 
Conneeticut Ri 
Granitic sand. 
. 
94-80 
94-90 
Phosphate of lime, 
. 
0-70 
0-20 
Sulphate of lime, 
- 
0-60 
1*20 
Soluble geine,t 
. 
310 
1*80 
Insoluble geine, 
- 
0*80 
1-90 
tl00*00 tioooo 
Quick sand from three localities near Rome, N. Y., which was 
dug through in excavating for the canal. 
No. i.t 
No. 2. 
No. 3. 
Water, of absorption. 
22-14 
18-92 
16-66 
Silica, 
. 73-27 
74-98 
75*12 
Alumina and iron, - 
1-53 
5-64 
7*14 
Carbonate of lime. 
. 0-32 
2-00 
0-98 
Magnesia, 
0-12 
0*22 
0*23 
97*39 101*76 100*13 
The specimen from which No. 1 was taken, was the coarsest; 
that from which No. 3 was taken, the finest. We do not know 
why No. 3 should take up less water than No. 1 or 2. The 
Oneida glass sand behaved in the same way. While coarse, it 
took up 2 per cent, of water more than it did after it was ground 
to an almost impalpable powder. 
• Analysis by Dr. Dana. 
t By the soluble and insoluble geino is meant the soluble and insoluble organic 
matter. 
X Analysis by Prof. Emmons. 
