TYPHOID FEVEK IN DISTKICT OF COLUMBIA. 
141 
No. 35. 
Location. — Third and C streets SE. (southwest corner). 
Kind. — Wood. 
Condition. — Fair, but poor stream; sediment in first water drawn; pipe drain to 
sewer. 
Depth. — Below surface, 26 feet 8 inches; water, 3 feet 3 inches. 
Sewer. — Depth, 12 feet; distance from well, 10 feet. 
Privies. — None within two blocks. , 
Bacteriologically . — Indicates sewage pollution; variable. 
Chemically. — Polluted. 
No. 91. 
Location. — Harrison street, between Seventeenth and Eighteenth SE. (south side). 
Kind. — ^Wood. 
Condition. — Fair; bricks loose at base; surface drainage to sewer. 
Depth. — Below surface, 12 feet; water, 6 feet. 
Sewer. — Depth, 11 feet; distance from well, 20 feet. 
Privies. — None in block; 2 within one and one-half blocks. 
Bacteriologically. — Indicates sewage pollution; variable. 
Chemically . — Polluted . 
The following 2 cases of typhoid fever drank the water of this well: 
Case 
No. 
Onset of 
disease. 
1 
During the 30 days preceding onset of disease used the well water — 
Probable source of 
infection. 
837 
Sept. 10 
Sept. 9 
Frequently 
? 
874 
do 
No. 92. 
Location. — Seventh and B streets SE. (northwest corner). 
Kind. — ^Wood. 
Condition. — Old; bricks loose at base; pipe drain to sewer. 
Depth. — Below surface, 33 feet; water, 3 feet. 
Sewer. — Depth, 12 feet; distance from well, 15 feet. 
Privies. — None within three blocks. 
Bacteriologically. — Good. 
Chemically. — Remote pollution. 
No. 101. 
Location. — Third street and Pennsylvania avenue SE. (southwest corner). 
Kind. — ^AVood. 
Condition. — Fair; pipe drain to sewer. 
Depth. — Below surface, 28 feet; water, 4 feet. 
Sewer. — Depth, 18 feet; distance from well, 40 feet. 
Privies. — None in block; 1 in opposite block. 
Bacteriologically. — Indicates surface contamination. 
Chemically . — Polluted . 
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. 
638 
Aug. 13 
Occasionally 
? 
