130 TYPHOID FEVER IH DISTRICT OF COLUMBIA. 
The following 3 cases of t^^hoid 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. 
364 
July 21 
Aug. 1 
Oct. 15 
F requently 
9 
546 
do 
9 
988 
do 
9 
Xo. 14. 
Location. — Xew York avenue, between Foui’th and Fifth streets XW. (south side, 
middle). 
Kind. — Wood. 
Condition. — Old; bricks loose at base; pipe drain to sewer. 
Depth. — Below surface, 14 feet; water, 4 feet. 
Sewer. — Depth, 10 feet; distance from well, 10 feet. 
Privies. — Xone in block; 6 within two blocks. 
Bacteriologically . — Fair. 
Chemically. — Remote pollution. 
The following 2 cases of t^^hoid 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. 
465 
July 24 
Aug. 1 
Frequently 
9 
484 
Occasionally 
9 
Xo. 15. 
Location. — Massachusetts avenue, between Sixth and Seventh streets XW. (in 
front of Xo. 619). 
Kind. — Wood. 
Condition. — -Old; pipe drain to sewer. 
Depth. — Below smdace, 31 feet; water, 17 feet. 
Sevjer. — Depth, 9 feet; distance from well, 10 feet. 
Primes. — Xone in block; 3 within radius of two blocks. 
Bacteriologically . — Indicates sewage pollution; variable. 
Chemically. — Remote pollution. 
Xo. 44. 
Location. — Wisconsin avenue and Q street XW. (southwest corner). 
Kind. — Wood. 
Condition. — Old; pipe drain to sewer. 
Depth. — Below surface, 29 feet 2 inches; water, 4 feet. 
Sewer. — Depth, ?; distance from well, 0 feet. 
Privies. — Xone in block; 2 within two blocks. 
Bacteriologically . — Good. 
Chemically. — Remote pollution. 
The following case of typhoid fever drank the water of this well; 
Case 
No. 
Onset of 
d sease. 
During the 30 days preceding onset of disease used the well water — 
Probable source of 
infection. 
607 
Aug. 11 
Occasionally 
Milk. 
