70 



TABLE XXXV. INCIDENCE OF COLON GROUP AND TYPHOID DEATH RATE 

 IN FILTERED WATER, ELMIRA, N. Y. (After Caird 1919). 



phoi< 

 Incite nc 



i Death f 



and 



Color 



Gro 





hlte 

 Eln 



ed 

 ra 1 



Ion Icemen 



ite 

 :e 



\ 





1903 



I9O5 



'07 '08 



/9IO 



1915 '/t '17 



The English and American bacteriologists uphold it. The Germans 

 have objected strenuously to its inclusion in water work. The contention 

 of Kruse, Konrich and other German investigators that colon bacilli may 

 be found in any water irrespective of its source, provided a sufficiently 

 large sample is taken, and that of Chick, Houston, and other English author- 

 ities, that these organisms are not present in water unless it has received 



