Proceedings of the Royal Society. 307 



Dec. 8. — A Paper entitled, Additional Proofs of the Source of 

 Animal Heat being in the Nerves, by Sir E. Home, Bart., F.R.S., 

 was read. 



This paper contains the account of a repetition of the author's 

 former experiments upon the effects of dividing the nerves sup- 

 plying the velvet of the deer's horn, in which the same result s 

 have been obtained, while some exceptionable parts of the former 

 proceedings have been carefully avoided. It was now found, as 

 before, that immediately upon the division of the nerves of one 

 horn, the temperature of that horn was diminished sometimes to 

 the amount of 7°, and that in the course of ten or twelve days the 

 disparity of temperature between the two horns began to cease, 

 and they ultimately again attained precisely the same tempera- 

 ture. When this was the case, the deer was killed, and the parts 

 carefully dissected and examined, when it was found that the inter- 

 val occasioned by the recession of the divided nerves, was filled 

 up by a newly-formed substance, which firmly connected them, 

 and this explained the restoration in their functions which had 

 taken place. 



In further proof of the influence of the nerves over the evolu- 

 tion of heat, independent of mere sanguineou scirculation, Sir 

 Everard adverts to a case of aneurism, in which he tied the femoral 

 artery immediately below Poupart's ligament. The obstruction of 

 this large arterial trunk, however, did not occasion any diminution 

 of temperature in the foot, below the natural standard. 





