Diffusion of Liquids. 415 



determined as a control. In the case of some few salts (CaCL 

 for instance) only the latter method could be well applied. 



The first experiments were on solutions of the chlorides ; 

 and the diffused amounts were determined by means of 



^ AgNOo with K 2 Cr0 4 as indicator. The burettes were fur- 

 nished with Erdmann's floats, and their accuracy tested by 

 comparing them with a standard. 



The results of the experiments are as follows : — - 



Diffusion of 2n 



NaCL 



Diffusion of 2n NH 4 CI. 





Cub. cent. 







Cub. cent. 





Time. 



40 ° 3 



Cub. cent, 

 per hour. 



Time. 



— AgN0 3 . 



40 5 3 



Cub. cent, 

 per hour. 



8-9 



2-1 



2-10 



4-8 A.M. 



32-5 



2-03 



9-11 



4-0 



2-00 



8-9 



2-4 



2-40 



11-2 



5-7 



1-90 



9-10 



2-3 



2-30 



2-4 



3-7 



1-85 



10-11 



2-4 



2-40 



4-8 A.M. 



28-8 



. 1-80 



11-2 



7-2 



2-40 



8-9 



2-0 



2-00 



2-4 



4-9 



2-45 



9-2 



10-1 



2-02 



4-8 A.M. 



38-4 



2-40 



2-4 



4-2 



2-10 



8-1 



10-5 



2-10 



4-8 A.M. 



33-6 



2-10 



45 h. 



100-6 



2-23 



8-9 



2-1 



2-10 









9-1 



8-4 



2-10 









53 h. 



104-7 



1-97 



In another experiment with NH 4 C1 solution, 44-5 cubic 

 centims. were required in 19 hours — that is, 2'34 cubic cen- 

 tims. per hour. The average of these is 2*28 cubic centims. 

 per hour ; and this for n solution is equivalent to about 1"15 

 cubic centim. per hour, or 



0-0369 gram NH 4 CI in 24 hours. 

 The rate of the NaCl solution is almost exactly equivalent 

 to 1 cubic centim. per hour for n solution, or 

 0-0351 gram NaCl in 24 hours. 



Diffusion of n 



KCl. 



Diffusion of 2n 



LiCl. 





Cub. cent. 







Cub. cent. 





Time. 



|>W 



Cub. cent, 

 per hour. 



Time. 



^A g N0 3 



Cub. cent, 

 per hour. 



8-9 



1-40 



1-40 



3-4 



2-1 



2-10 



9-11 



2-90 



1-45 



4-8 A.M. 



28-8 



1-80 



11-2 



4-35 



1-45 



8-11 



5-1 



1-70 



2-4 



2-64 



1-32 



11-2 



5-7 



1-90 



4-8 A.M. 



20-85 



1-30 



2-4 



3-8 



1-90 



8-10 



2-70 



1-35 



4-8 A.M. 



30-4 



1-90 



26 h. 



34-84 



1-34 



41 h. 



75-9 



1-85 



