PHYSIOLOGICAL RESEARCHES. 



I. 



The Croonian Lecture, on some Physiological Re- 

 searches, respecting the Influence of the Brain on 

 the Action of the Heart, and on the Generation 

 of Animal Heat. 



[From the Philosophical Transactions for 1811.] 



HAVING had the honour of being appointed by 

 the President of the Royal Society to give the 

 Croonian Lecture, I trust that the following 

 facts and observations will be considered as tend- 

 ing sufficiently to promote the objects for which 

 that Lecture was instituted. They appear to 

 be of some interest as throwing light on the mode 

 in which the influence of the brain is necessary 

 to the continuance of the action of the heart; 

 and also as shewing that the integrity of the 

 nervous system is in some way necessary to the 

 production of animal heat. 



In making experiments on animals to ascer- 



