300 TYPHOID PEVEE IX DISTEICT OF COLHHBIA. 
communicate directly with the standpipe, but connect directly with 
the distributing mains. The Chevy Chase district school is also sup- 
plied with water from a well of its own. The Chevy Chase Park, about 
3 mi les beyond Chevy Chase circle, is supplied by a pump located at 
the street-car .station and also by a spring at the lower end of the 
lake. The former has generally been found to be in bad repair, and 
the spring is so situated that it probably receives some drainage from 
the road. The waters of this well and spring are used for drinking 
purposes by the employees of the street car company and by a con- 
siderable number of visitors to Chevy Chase Park, especially during 
the summer months. The results of our analyses of the Chevy Chase 
waters are given in Table 27. So far as we may judge from the 
chemical examination, the main water supply of Chevy Chase is pure. 
Indeed, it seems to be an excellent water, and the same may be said 
of the spring, although, as already pointed out, its situation is such as 
would condemn it on sanitary grounds. The well at Chevy Chase 
school supplies a good water, but the other well located at the Park 
gave some chemical evidence of pollution. 
The results of the bacteriological examinations- of these several 
miscellaneous water supplies are given in the follovdng tables: 
Results of bacteriological examinations of the miscellaneous water supplies. 
Xo. Loc-ation. 
Date. 
Xumber Ferment in lac- r coli nresent 
ofbacte- tose bouihon. con present. 
iia pci 
cubic 
centime- 0.1 cc. 1 cc. 10 cc. O.lcc. 1 cc. 
ter. 
10 cc. 
19C6. 
■ 
214 CbevT Chase ■water supply 
Aug. 30 
“35 --!-+ ■ 
+ 
474 Cheyy Chase hydrant 
Oct. 23 
110 -1- -i- 
215 Che'vw Chase district school 
Aug. 30 
— 
475 do 
Oct. 23 
0 — — — — 
315 ! Soldiers’ Home, Scott spring 
Sept. 21 
23 - - -i - - 
— 
316 ‘ Soldiers’ Home pump-house tank 
do . . . 
37 - - - - - 
343 Soldiers’ Home 
Sept. 28 
26 - - - - - 
— 
L do 
46 . ... — — 
8S St. Ehzabeth -well 
Aug. 6 
6 - - - - - 
— 
89 St. Ehzabeth cistern 
do . . . 
6,000 -1- + -1- — — 
113 do 
-Vug. 10 
473 - - - - - 
— 
112 St. Elizabeth pump Xo. 2 
do 
2 
114 St. Elizabeth engine house 
do . . . 
149 - — — — - 
115 St. Ehzabeth administration building. . 
do ... 
113 - - 4- 
- 
a In 1 cubic centimeter (?). 
