JACQUES LOEB 



479 



CD 

 ■*-> 



c 



CD 

 CM 





C3 



nJlM riMHtTMriMMIliM 

 ^ 2048 iOM 512 256 128 64 3Z 16 8 4 2 ^^^ 



Concentra.tion 



Fig. 4. Transport curves at the isoelectric point of gelatin. The curves for 

 NaCl, CaCl2, and NaoSO* resemble the transport curve for cane-sugar showing 

 that osmotic forces suffice to explain these curves. The curve for Ce(N03)3 

 suggests that this salt confers a positive charge to the gelatin. 



