COMMUNITY SANITATION 



423 



other community obtains its water. When the direction 



of the Chicago River was changed to carry Chicago's 



sewage into the Mississippi River system and water 



'intakes were built four miles out in the lake, Chicago's 



Double floor of wood 

 k i^Boards laid at rioht angles 



1 ' i---^l'//7Z3 *\ 3K 



FIG. 373. A Properly Located and Constructed Well to Prevent the Entrance 

 of Seepage Water. 



death rate was reduced from 5.97 in 1891-1900 to 2.21 

 in 1901-1910. 



If there is any reason to believe that your water supply 

 has been contaminated by typhoid fever germs, do not 

 fail to boil the water twenty minutes. It will take that 

 long to kill the germs. Four per cent of all typhoid 

 patients carry the germs in their bodies for from ten weeks 

 to two years, even though they appear perfectly well. These 

 " typhoid carriers " may give the disease to many others. 



