of Gibus's Theory of Surface- Concentration. 

 The tension-concentration curve is given in fig. 3. 



475 



Fijy. 3. 



52 

 51 



y 











































s 

















u 50 

















CD 























^KCL 









.2 48 



H 



















*^Sk: 



:u cl 



2 









47 

















46 









I ^W 













> 





0*02 0'04 0-06 U-US 



Molar Ccncsntration. 



M 



As before, the calculated adsorption for - KOI is 



c = 0*0037 grm./c.c. 

 8-4 x 10 7 ergs. 



K 



;^7 



where 37 is the osmotic molecular weight. 



T = 28 9° abs. 

 da 

 dc 



478. 



Hence 



c da 



Yz rv — — = 2'3 x 10~° gram KC1 per cm. 2 surface, 



which corresponds to 1'7 X 10~ 9 grm. of potassium, 

 while T K (found) is ox 10~ 8 grm. cm. L> 



