24 



The Philippine Journal of Science 



Time in minutes. 



100 120 1*0 



ISO 200 120 



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y- • — < 1 1 



k 1 — ' • — i — I — i 



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Fig. 3. The decomposition of chloride of lime solution in diffused daylight. 



Table III. — Effect of light on chlorine consumption; 200 cubic centimeter 

 samples of different waters digested two hours at 28° C. 



Available chlo- 

 rine consumed. 





[n dif- 

 fused 

 day- 

 light. 



In 

 dark. 



Differ- 

 ence. 



mg. 



mg. 



mg. 



0.28 



0.11 



0.17 



0.47 



0.25 



0.22 



0.14 



0.14 



0.00 



0.45 



0.45 



0.00 



0.50 



0.24 



0.26 



0.66 



0.45 



0.21 



0.65 



0.23 



0.42 



0.87 



0.43 



0.44 



0.53 



0.23 



0.30 



0.60 



0.28 



0.32 



Sky was heavily overcast, and laboratory was dark. 



