Fio. 3. Experiment 3. The Death Rate of Bact. ttphos0m in Autoclaved 

 Tap Water at 0°, 10°, 20°, 30°C. 



Duplicates at any temperature are marked: (I) and (II). Observed pH 

 values of the water are noted along the curves. 



o Coyi 6 



Fia. 4. Experiment 4. The Death Rate of Bact. coli in Berkefeld-Filtered 

 Tap Water at 0°, 10°, 20°, 30°C. 



Duplicates at any temperature are marked: (I) and (II). Observed pH 

 values of the water are noted along the curves. 



195 



