CHEMICAL EXAMINATION OF THE WATEE SUPPLY, 
315 
Table 6. — Analyses of city water supplies. 
City. 
Source of supply. 
Ammonia. 
Chlo- 
rine. 
Ni- 
trites. 
Ni- 
trates. 
Oxygen 
con- 
sumed. 
Total 
resi- 
due. 
Free. 
Album- 
inoid. 
Poughkeepsie, N. Y. n , . . 
Hudson River 
0. 050 
0. 125 
4.5 
Trace. 
Trace. 
2. 287 
85.0 
Washington, D. C. o 
Potomac River. . . 
.050 
.127 
1.1 
Trace. 
0. 230 
1.021 
165.0 
Richmond, Va. “ 
James River 
.550 
.150 
1. 17 
Trace. 
Trace. 
1.654 
105.0 
Rock Island, 111. a 
Mississippi River. 
.025 
.260 
1.00 
0 
Trace. 
6. 000 
140.0 
New Orleans, La. o 
do 
.040 
.325 
14.50 
0 
.080 
5. 724 
340.0 
Cincinnati, Ohioo 
Ohio River 
.003 
.108 
14.0 
.26 
140.0 
Louisville, Ky. (before 
do 
.034 
.530 
6.2 
0. 004 
1.0 
9. 90 
800.0 
fi.ltration). b 
LouisviUe, Ky. (after fil- 
do 
.085 
.130 
5. 78 
. 0085 
.5 
1.5 
255.0 
tration). b 
. 
Philadelphia, Pa. a 
Schuylkill River . . 
.010 
-.100 
0 
.46 
133.4 
Albany, N. Y. a 
Hudson River 
.070 
.200 
2.5 
Trace. 
.082 
5.7 
Troy, N. Y. « 
do 
.040 
.150 
2.5 
0 
.041 
8. 4 
Cohoes, N. Y. a 
Mohawk River . . . 
.060 
.210 
4.0 
.002 
.246 
3.55 
a Mason, “Water Supply,” New York, 2d ed., 1898, p. 465. 
b Fuller, “Water Purification at Louisville,” New York, 1898, pp. 197-204. 
