194 DR. JAMES BOTTOMLEY ON THE ABSORPTION 



Here again there still remains a tendency to make the 

 column a little longer than the theoretical. 



I repeated the experiments in which the strength of the 

 comparison-diffusion is several times a multiple of the 

 strength of the standard diffusion. The strength of the 

 standard diffusion was the same as in the previous experi- 

 ments ; and the length of the column was 21 "2. 



Exp. XIX. — Comparison-diffusion contains 9*6 cub. c. 

 in 500 cub. c. 



A B C D 



2-63 2-98 2-8 2-65 



When I actually tried the theoretical column 1 thought 

 that the tint was_, perhaps, slightly lighter. 



Exp. XX. — Comparison-diffusion contains I4"4 cub. c. 

 in 500 cub. c. 



A B D 



I"9 2*15 2*02 177 . 



The tint given by the theoretical column I thought slightly 

 lighter. 



Exp. XXI. — Comparison-diffusion contains 19*2 cub. c. 

 in 500 cub. c. 



A B C D 



1-55 1-63 1-59 1-32 



The tint given by the theoretical column I thought slightly 

 lighter. 



Exp. XXII. — Comparison-diffusion contains 24*0 cub. c. 

 in 500 cub. c. 



A B C D 



115 I'3 I"22 i'o6 



The tint given by the theoretical column I thought slightly 

 lighter, but hardly distinguishable. 



