NaOH 

 24 



1 2 3 



Bays at 22° 



Fig 8 Action of trypsin on gelatin partiaUy hydrolyzed by acid. 500 cc. of 

 5 per cent gelatin brought to pH 1 .8 with HCl and the solution kept at 90 C 25 cc. 

 samples pipetted out at intervals and 5 cc. of 1.0 m Na.COs added to each Samples 

 kept at 3° until aU had been collected. They were then put at 22 and 1 cc. ot 

 10 per cent dialyzed trypsin added to each sample. Formol titration was run 

 on 5 cc. The figures plotted have been calculated on the basis of 10 cc. of 5 per 

 cent gelatin. ^^ 



