238 



Dr. W. M. Bayliss. 



[June 30 



Fig. 2. 



The apparent tendency of the numbers in the last column of Table III 

 cowards a maximum at 224 litres dilution is merely accidental, since other 

 experiments do not show the phenomenon. Table IV gives some additional 

 values. 



Table IV. 



Osmotic pressure 



The results of an application of v. d. Waals' formula to the present case 

 have been worked out by Mr. Hardy, who informs me that, if such a formula 



