48 



ABSORPTION OF LIGHT BY WATER CHANGED 



In table 6 the depth of layer of all the solutions was the difference between 

 21 and 1, i. e., 20 mm. The depth of water was in every case the same as 

 that of the water in the solution in question. 



The depth of layer of the solutions given in table 7 was the difference 



between 11 mm. and 1 mm., i. e., 10 mm., and was only half of that in 



table 6. The object of this was to bring out more prominently the second 



water-band. The depth of water used was in every case the same as that 



of the water in the solution. 



Table 8. 



