74 



The Philippine Journal of Science 



1916 



Table I. — Calcium hypochlorite added twice a week to water in swimming 

 pools, week of August 30 to September U, 1915 — Continued. 



[Bacteria per cubic centimeter of water — Continued.] 





Aug. 30. 



Aug. 31. 



Sept. 1. 



Sept. 2. 



Sept. 3. 



Sept. 4. 



Pool I: 



Bacillus coll test of 1 cc. water — 

 Lactose bile 







+ 

 + 







+ 



















+ 

 + 







+ 







Litmus lactose a^ar 



Coit-like colonies on original 

 plates of— 



Litmus lactose agar 



Congo red agar... 



Pool II: 



Bacillus coli test of 1 cc. water — 

 Lactose bile 





 









 









 









 









CoK-like colonies on original 

 plates of— 



Litmus lactose agar 



Congo red agar 





 



+ 

 + 





 





 



+ 







+ 





 



+ 

 + 





 





 



+ 

 + 





 





 



+ 





 





 



Pool III: 



Bacillus coli test of 1 cc. water — 

 Lactose bile 



Litmus lactose agar 



CoZi-like colonies on original 

 plates of— 



Litmus lactose agar 



Congo red agar 













Table II. — One-half part per m,illion of available chlorine as calcium hypo- 

 chlorite, added weekly to water in swimming pools, week of September 

 20 to 25, 1915. 



[Bacteria per cubic centimeter of water.] 





Sept. 20. 



Sept. 21. 



Sept. 22. 



Sept. 23. 



Sept. 24. 



Sept. 25. 



Pool I: 



Agar, 25° C 



20 

 50 



100 

 120 



10,000 

 10,500 



80,000 

 60,000 



40,000 

 60.000 



100,000 

 170,000 



Agar, 37°C._.. 



Average 



Pool II: 



Agar, 25°C 



35 



110 



10.250 



70,000 



60,000 



135, 000 



3,500 

 4,000 



400 

 600 



12.000 

 13. 000 



10,000 

 16,000 



10,000 

 20,000 



110,000 

 150, 000 



Agar, 37° C — . 





3,750 



500 



12,500 



13,000 



15.000 



130,000 



Pool III: 



Agar, 25° C 



40,000 

 50, 000 





2,400 

 3,000 



100, 000 

 100, 000 



100,000 

 120,000 



1,900,000 

 2,200,000 



Agar, 37° C 





Average . . . 





45, 000 





2,700 



100, 000 



110, 000 



2.050,000 







