108 



The Philippine Journal of Science 



1916 



Table III. — Variation in quality of water. Addition: 1 part of CuSOi.5HtO 

 per million parts of water. 



[Results expressed as parts per millioii.] 



Age of water in days. 



Pool I.» 



Pool II. b 



Pool III.C 



Chlo- 

 rides 

 (CI). 



Oxygen 



con- 

 sumed 

 (O). 



Tur- 

 bidity. 



Chlo- 

 rides 

 (CI). 



Oxygen 



con- 

 sumed 

 (O). 



Chlo- 

 rides 

 (CI). 



Oxygen 

 con- 

 sumed 

 (O). 



Tur- 

 bidity. 



1 



7.5 

 4.8 

 6.0 

 4.7 

 4.6 

 4.6 



1.12 

 1.37 

 1.00 

 0.97 

 1.18 

 l.OB 



11.5 

 10.5 

 10.7 

 10.5 

 10.5 

 9.7 



4.9 

 4.7 

 5.5 

 5.8 

 6.0 

 5.8 



0.98 

 1.23 

 1.44 

 1.47 

 1.85 

 1.80 



4.7 

 5.3 

 4.4 

 4.6 

 4.5 



1.20 

 1.52 



11.7 

 11 .S 



2 



3 



1.32 11 3 1 



4 



1.42 

 1.64 



9.7 

 10.6 



5— 



6- 











• Average temperature, 28.5° C. Total bathers, 235. 



* Average temperature, 27.5° C. Total bathers, 346. 

 <= Average temperature, 28.5° C. Total bathers, 85. 



Table IV. — Daily variation in quality of water. Addition: 2 parts 

 CuSOfSHiO per million parts of water. 



[Results expressed as parts per million.] 



Age of water in days. 



Pool I.« 



Pooin.b 



Pool III.C 



Chlo- 

 rides 

 (CI). 



Oxygen 



con- 

 sumed 

 (O). 



Tur- 

 bidity. 



Chlo- 

 rides 

 (CI). 



Oxygen 



con- 

 sumed 

 (O). 



Chlo- 

 rides 

 (CI). 



Oxygen 



con- 

 sumed 

 (0). 



Tur- 

 bidity. 



1 



4.9 

 4.7 

 4.8 

 4.9 

 4.6 

 4.5 



1.05 

 1.10 

 1.20 

 1.09 

 1.11 

 1.23 



12.8 



13 



12 



13.6 



12.4 



5.6 

 5.7 

 6.0 

 5.5 

 5.6 

 5.8 



1.01 

 1.08 

 1.15 

 1.22 

 1.18 

 1.34 



4.6 

 5.6 

 4.4 

 4.5 

 3.7 

 4.1 

 4.0 

 4.2 



1.48 

 1.67 

 1.53 

 1.68 

 1.37 

 1.37 

 2.09 

 1.84 



20 

 12 



14 

 13 

 13 

 10 



2 . 



3 



4 -. . 



5 



6 



7 



8 















1 





1 



» Average temperature, 28.0° C. 

 » Average temperature, 28.0° C. 

 = Average temperature, 28.5° C. 



Total bathers, 259. 

 Total bathers, 233. 

 Total bathers, 112. 



