112 ADDITIONAL NOTES. 



ing the texture of the brain, there cannot fail to 

 be a still larger haemorrhage, from the laceration 

 of the arterial circle formed by the carotid and 

 vertebral arteries in the base of the brain. In 

 either case the hasmorrhage would probably 

 continue for some time after the artificial re- 

 spiration was begun, and must considerably 

 influence the result of the experiment. As I 

 have already stated, it was to avoid a similar 

 source of error that I had recourse to the method 

 of destroying the functions of the brain by means 

 of narcotic poison, and it is plain that in com- 

 paring the results of our respective expe- 

 riments, it is not with these last, but only with 

 the first of my experiments, that the comparison 

 should be made. 



The experiments of M. Le Gallois having been 

 made on much younger and smaller animals than 

 those employed by myself, the question is not as 

 to the absolute quantity of air consumed where 

 the influence of the brain is destroyed, but as to 

 the proportion which it bears to the air con- 

 sumed by animals of the same kind and size 

 breathing under ordinary circumstances. Of 

 his experiments, five in number, the results 

 were very different. In one instance, a rabbit 

 which, breathing under natural circumstances, 

 had generated 142-43 cubic centimetres in 30 

 minutes, when under the influence of artificial 

 respiration generated as much as 137 '8 cubic 

 centimetres in the same space of time ; while in 

 another the corresponding numbers were 259*8, 



