178 Influence of Cobra-venom on the Proterd Metabolism. 
2. A slight decrease in the proportion of urea nitrogen, quite insignificant 
compared with that produced by diphtheria toxine and various drugs, was 
observed. 
3. A slight rise in the proportion of ammonia nitrogen occurred. 
4, There was a slight rise in the proportion of nitrogen in purin bodies. 
5. The nitrogen in other compounds showed no constant change. 
6. The P,O, excreted showed no constant change, but in two experiments 
there was a slight rise. 
The change produced in the proteid metabolism is, therefore, small, and 
such as it is, being in the directions of decreased elaboration of urea and 
increase in the proportion of nitrogen excreted as ammonia, 1b seems to 
indicate a slight toxic action on the hepatic metabolism rather than a general 
action on the proteid changes; and tends to confirm the view that the poison 
acts chiefly upon the nervous system. 
