50 



ABSORPTION OF LIGHT BY WATER CHANGED 



The depth of layer of the different solutions for which the results are 

 recorded in table 10 was the difference between 21 and 1 mm., i. e., 20 mm. 

 The results are, therefore, comparable with those recorded in table 8, the 

 difference being a difference in the concentrations of the solutions used. 

 The difference between the transmission of the solution and that of water at 

 the same depth as the water in the solution is very much less for the more 



Table 10. 



