•JACQUES LOEB 



289 



representing the permanent osmotic pressures of the various gelatin 

 solutions. 



When we select gelatin chloride with about the maximal osmotic 

 pressure, i.e. gelatin chloride with a pH of 3.5, and add various 



340 

 320 

 300 

 280 



Jl_ ii H il IL Ji IL 11 JM 

 4000 ZOOO 1000 500 250 125. 62 31 15 ' 



Concentration of acid added 



Fig. 11. Showing depressing effect of addition of HNO3 and H2SO4 to 1 per 

 cent gelatin chloride upon osmotic pressure. Depressing effect of SO4 greater 

 than that of HNO3. 



