PURIFICATION OF WATER FOR DRINKING PURPOSES 183 



Seine Water 



Temperature Number of 



maintained Microbes in 1 c.c. 



22 C. . . *: ...-;'. 848 



43 C. during 15 minutes . . 640 



50 C. . 132 



60 C. . 40 



70 C. . 27-2 



80 C. . 26-4 



90 C. . 14-4 



100 C. . 5-2 



River Ourcq Water 



Temperature Number of 



maintained Microbes in 1 c.c. 



14 C 460,800 



50 C. during 10 minutes . . '600 



60 C. . (60) 



70 C. . 88-8 



80 C. . 62-4 



90 C. . 26-4 



100 C. . 0-5 



100 C. during 20 . O'O 



Vanne Water 



Temperature Number of 



maintained Microbes in 1 c.c. 



13 C . . 4,800 



50 C. during 10 minutes . . 175 



60 C. . 



70 C. ., 3 



80 C. ., . 1-7 



90 C. . 0-3 



100 C. . 



100 C. during 20 . 



We would refer the reader to the chapter on the 

 multiplication of micro-organisms, where an account is 

 given (p. 229) of experiments on the capacity of boiled 

 water to subsequently support bacterial life. 



As regards the effect of high temperatures on patho- 

 genic organisms purposely introduced into water, the 

 experiments of Currier 1 throw some light. The organ- 

 isms were introduced into unsterilised spring water 



Sterilization of Water,' New York Medical Record, No. 1023, 1890, 



p. 680. 



