JACQUES LOEB 



291 



The outside solutions had the same pH as the solution in the col- 

 lodion bag and contained also the same concentration of potassium 



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Concentration of salt added 



Figs. 13 and 14. Depressing effect of addition of salt to 1 per cent gelatin 

 chloride pH = 3.3. SO4 depresses more than NO3. 



salt as was added to the gelatin. The curves in Figs. 13 and 14 show 

 that the depressing effect of an addition of KNO3 is about the same 

 as the addition of an equal amount of HNO3, and that the addition 



