TYPHOID FEVER IH DISTRICT OF’ COLUMBIA. 129 
The following case of typhoid fever drank the water of this well: 
Case 
No. 
Onset of 
disease. 
During the 30 days preceding onset of disease used the well water — 
Probable source of 
infection. 
231 
July 2 
Occasionally 
No. 9. 
Location. — Tenth and K streets NW. (northwest corner). 
Kind. — ^\Vood. 
Condition. — Old; bricks loose at base; pipe drain to sewer. 
Depth. — Below surface, 10 feet; water, 2 feet. 
Sewer. — Depth, 11 feet; distance from well, 30 feet. 
Privies. — Nearest, two and one-half blocks. 
Bacteriologically.— Indicates sewage pollution; variable. 
Chemically. — Remote pollution. 
The following 5 cases of typhoid fever drank the water of this well: 
Case 
No. 
Onset of 
disease. 
During the 30 days preceding onset of disease used the well water — 
Probable source of 
infection. 
470 
July 30 
Frequently 
? 
488 
July 25 
do 
? 
665 
Aug. 25 
Occasionally 
? 
800 
Sept. 8 
do 
? 
844 
Sept. 15 
do 
Contact. 
No. 11. 
Location. — Seventeenth and K streets NW. (northeast corner). 
Kind. — ^\\^ood. 
Condition. — Fair; pipe drain to sewer; bricks loose at base. 
Depth. — Below surface, 24 feet; water, 4 feet. 
Sewer. — Depth, 9 feet; distance from well, 10 feet. 
Privies. — One in opposite block. 
Bactei'iologically . — Fair. 
Chemically. — Remote pollution. 
The following 2 cases of typhoid fever drank the water of this well: 
Case 
No. 
Onset of 
disease. 
During the 30 days preceding onset of disease used the well water— 
Probable source of 
infection. 
267 
July 2 
Sept. 15 
Occasionally 
844 
.... .do 
Contact. 
No. 13. 
Location. — Third street and Indiana avenue NW. (northeast corner). 
Kind. — Wood. 
Condition. — Fair; pipe drain to sewer. 
Depth. — Below surface, 7 feet 6 inches; water, 2 feet. 
Sewer. — Depth, 14 feet; distance from well, 40 feet. 
Privies. — None within three blocks. 
Bacteriologically . — Indicates sewage pollution; variable. 
Chemically. — Polluted. 
29643—07 9 
