76 



The Philippine Journal of Science 



1916 



Table V. — One part per million copper sulphate, added weekly to water in 

 swimming pools, week of October 11 to 16, 1915. 



[Bacteria per cubic centimeter of water.] 





Oct. 11. 



Oct. 12. 



Oct. 13. 



Oct. 14. 



Oct. 15. 



Oct. 16. 



Pool I: 



Agar, 25° C. . 



60 

 30 



2.000 

 1.700 



34.000 

 57, 000 



100. 000 

 360.000 



400,000 

 500,000 



120,000 

 210,000 



Agar, 37° C 



Average 



45 



1.850 



45.000 



220.000 



450, 000 



165,000 



Pool II: 



Agar, 25° C 



400 

 220 



100 

 80 



8.400 

 17,000 



5. 100. 000 

 5.700.000 



400, 000 

 800,000 



210,000 

 300, 000 



Agar. 37° C. 



Average - 



310 



90 



10, 200 



K_ doft nnn 



600,000 



255,000 



Pool III: 



Agar. 26° C 





22, 800 



28, 600 



600 

 110.000 



1,000 

 200.000 



110.000 

 120.000 



30,000 

 80, 000 





Agar, 37° C. 









26, 700 



55, 300 



100. 500 



115,000 



55,000 













Table VI. — Two parts per million copper sulphate, added weekly to water in 

 swimming pools, week of October 18 to 23, 1915. 



[Bacteria per cubic centimeter of water.] 





Oct. 18. 



Oct. 19. 



Oct. 20. 



Oct. 21. 



Oct. 22. 



Oct. 28. 



Pool I: 



Agar. 25° -.. 



BOO 

 600 



28.000 

 18.000 



170. 000 

 220. 000 



1, 800. 000 

 2,800.000 



5, 100, 000 

 6,300,000 



17, 000, 000 

 18,000,000 



Agar. 37° C 



Average- - - 



560 



23, 000 



195. 000 



2, 300. 000 



5,700,000 



17.600,000 



Pool II: 



Agar, 26° C 



900 

 12,000 



20,000 

 19.000 



570. 000 

 280,000 



2, 300, 000 

 3,900,000 



5, 400, 000 

 6,900,000 





Agar, 37° C 





Average 





10,500 



19. 500 



425. 000 



3.100,000 



6,150,000 





Pool III: 



Agar. 25° C 





120,000 

 130. 000 



160,000 

 160,000 



20,000 

 50. 000 



300 

 9,000 



3,000 

 4,000 



2,800.000 

 4.800,000 



Agar. 37° C 



Average 



125,000 



165,000 



35,000 



4,650 



3.500 



3,800,000 





