OF LIGHT BY TURBID SOLUTIONS. 191 



Exp. III. — Comparison-diffusion contains 3*0 cub. c. in 

 500 cub. c. 



A B C D 



8-4 9-Z5 8-83 8-48 



Exp. IV. — Comparison-diffusion contains 3*6 cub. c. in 

 500 cub. c. 



A B C D 



6*85 7-6 7*22 7*07 



Exp. V. — Comparison-diffusion contains 4*2 cub. c. in 

 500 cub. c. 



i 

 A B C D 



5"6 6*1 5-85 6'o6 



Exp. VI. — Comparison-diffusion contains 4'8 cub. c. in 

 500 cub. 6. 



A B D 



5*1 5-55 S"3* 5'3 



Exp. VII. — Comparison-diffusion contains 5*4 cub. c. in 

 500 cub. c. 



A B D 



4-1 4-5 4*3 471 



On another occasion I got a nearer result^ as follows : — 



A B D 



47 4'95 4"8a 47» 



Exp. VIII. — Comparison-diffusion contains 6 cub. c. in 

 500 cub. c. 



A B D 



4-13 4-58 4-36 4-24 



