202 



TABLE VII. 



Table VII shows that the puri ne nitrogen content in the au- 

 tolj^zed Hquid, after Q6 hours incubation at 37°, is nearly always 

 Constant. Reffering to a kilogram of fresh brain it results that, 

 in average, 0.251 grms. of purine nitrogen are freed by the 

 nuclease from the nucleic acid. About 10 per cent of the 

 incoagulable nitrogen in the filtrate of the main- 

 research is found in the forni of purine nitrogen. 



