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EARLE B. PHELPS 



determinations of the numbers of organisms present were made at 

 intervals during the experiment, as indicated in the tabulated results. 

 In the following tables the full details of each experiment are 

 first given, including the actual bacterial counts. In order to compare 

 the various experiments, the bacterial results have been calculated 



EXPERIMENT i. 

 STARTED JANUARY 24, 1906. 



Temperature, 2o-22. 



EXPERIMENT 2. 

 TAP WATER STARTED JANUARY 29, 1906. 



Temperature, 2O-23. 



EXPERIMENT 3. 

 STARTED FEBRUARY 6, 1906. 



Temperature, 2o-22, 



