132 TYPHOID FEVER IX DISTRICT OF COLUMBIA. 
The following 2 cases of tA’phoid fever drank the water of this well: 
Case 
Xo. 
Onset of 
disease. 
During the 30 days preceding onset of disease used the weU water — 
Probable source of 
infection. 
390 
July 19 
Frequentlv 
Milk. 
642 
July 21 
O 
Xo. 58. 
Location. — Thirty-fourth street near Wisconsin avenue XW. (west side). 
Kind. — Wood. 
Condition. — Fair; pipe drain to sewer. 
Depth. — Below surface, 22 feet; water, 3 feet. 
Sewer. — Depth, 12h feet; distance from well, 20 feet. 
Privies. — T’^o in block; four others within one and one-half blocks. 
Bacteriologically. — Good. 
ChernicaUy. — Remote pollution. 
Xo. 67. 
Location. — Thirty-fifth and Reservoir streets XW. (southwest corner). 
Kind. — Wood. 
Condition. — Old; verj’ rotten; bricks loose at base; surface drainage to sewer. 
Depth. — Below surface, 25 feet; water, 3 feet. 
Sewer. — Depth, 12 feet; distance from well, 40 feet. 
Privies. — One in block. 
Bacteriologically. — Good. 
Chemically. — Remote pollution. 
The following 3 cases of t^'phoid fever drank the water of this well: 
Case 
Xo. 
Onset of 
disease. 
During the 30 days preceding onset of disease used the well water — 
Probable source of 
infection. 
547 
Aug. 9 
Occasionally 
MUk. 
574 
Aug. 11 
Habitually 
• Do. 
642 
July 21 
Occasionally 
O 
Xo. 72. 
Location. — Third and L streets XW. (northwest corner). 
Kind. — Wood. 
Condition. — Fair; pipe drain to sewer. 
Depth. — Below surface, 18 feet; water, 8 feet. 
Sewer. — Depth, 8 feet; distance from well, 20 feet. 
Privies. — One in block. 
Bacteriologically. — Good. 
Chemically. — Polluted. 
The following 4 cases of t^^hoid fever drank the water of this well: 
Case 
Xo. 
Onset of 
disease. 
During the 30 days preceding onset of disease used the well water — 
Probable source of 
infection. 
348 
July 15 
Frequently 
0 
543 
Aug. 1 
Occasionally 
0 
660 
Aug. 20 
do 
9 
689 
Aug. 23 
Frequently 
9 
