356 TYPHOID FEVEK IN DISTEICT OF COLUMBIA. 
Table 15. — List of wells which on account of chemical and bacteriological findings and 
general insanitary surroundings are regarded as unfit for drinhing pur 'poses. 
No. of 
well. 
Location. 
No. of 
well. 
Location. 
Northeast. 
Northwest — Continued. 
24 
Fourth and E streets. 
128 
Eighth street and Barry place. 
38 
E street, between Eighth and Ninth streets. 
131 
New Jersey avenue and Morgan street. 
135 
Eleventh and F streets. 
169 
Newton street east of Brightwood avenue. 
217 
Bennings crossroads. 
175 
Thirty-third street and Wisconsin avenue. 
218 
Bennings School. 
202 
Pump, Zoological Park. 
225 
South Dakota avenue and Vista street. 
Southeast. 
Northwest. 
30 
Fourth street and South Carolina avenue. 
8 
Tenth and N streets. 
32 
Fifth and G streets. 
9 
Tenth and K streets. 
35 
Third and C streets. 
13 
Third street and Indiana avenue. 
91 
Harrison avenue and Seventeenth street. 
15 
Massachusetts avenue, between Sixth and 
101 
Third street and Pennsylvania avenue. 
Seventh streets. 
116 
Jefferson street between Monroe and Fill- 
46 
Wisconsin avenue and P street. 
more streets. 
48 
Twenty-eighth and 0 streets. 
Southwest. 
77 
Sixteenth and Corcoran streets. 
111 
New Jersey avenue and Pierce street. 
104 
South Capitol and M streets. 
Table 16. — Summary of 14 analyses of the waters of the reservoirs and storage basin, 
made at intervals of 3-4 days to 1 week apart from July 30 to September 21 , 1906. 
Reservoir. 
Turbidity .o 
Total sohds. 
Chlorine. 
Ammonia. 
Nitrites. 
Nitrates. 
D i s s olved 
oxygen. 
Per cent of 
saturation. 1 
1 
Oxygen con- 
sumed. 
Total 
residue. 
Mineral 
matter. 
Volatile 
matter. 
Free. 
Albumi- 
noid. 
Dalecarlia, inlet 
221 
203 
156 
47.1 
2.6 
0. 024 
0. 161 
0. 0031 
0. 61 
7. 44 
89.6 
4.1 
Dalecarlia, outlet 
99.0 
163 
115 
48 
2. 61 
.027 
.131 
.0051 
.57 
7.62 
92.4 
3.4 
Georgetown 
55.2 
160 
111 
49 
2. 61 
.022 
.117 
.0065 
..60 
7. 44 
90.0 
3.3 
Washington City (unfiltered) 
46.3 
141 
100 
41 
2. 47 
.017 
.096 
.0056 
.61 
7. 60 
90.0 
3.0 
Storage basin (filtered) 
4.6 
127 
88 
39 
2. 53 
.015 
.054 
.0003 
.67 
5. 87 
71.4 
2.0 
a Average of all readings made. 
Table 17. — Summary of the results of analyses made in the laboratory of the filtration 
plant of weekly samples of the waters of the reservoirs from February 13, 1906, to June 
26, 1906. 
[Compiled from Captain Cosby’s annual report.] 
Reservoir. 
Sus- 
pended 
solids. 
Tur- 
bidity. 
Chlo- 
rine. 
Ammonia. 
Nitrites. 
Nitrates. 
Dis- 
solved 
oxygen. 
Free. 
Albu- 
minoid. 
Dalecarlia, inlet .... 
180 
223 
2.0 
0. 032 
0. 244 
0. 0033 
0. 79 
Daleca.rlia, outlet 
56 
96 
1.7 
.029 
.152 
.0028 
.78 
Georgetown 
34 
53 
1.7 
.016 
.124 
.0033 
.77 
Washington City 
31 
1.6 
.015 
.073 
.0028 
.79 
9. 72 
Storage basin (filtered) 
4 
1.6 
.010 
.041 
.0004 
.92 
8. 10 
