JOHN H. NORTHROP 



491 



12 3 4 5 6 7 



Time in hours 



Fig. 1. Rate of digestion of 5 per cent and 1 per cent gelatin with 1 unit and j 

 10 units trypsin as followed by the increase in conductivity. 



0.20 Q2A 



Fig. 2. Large scale of the beginning of Fig. 1. 10 units trypsin. 



0.04 0.08 0.12 0.16 



Time in hours 



