Additional proofs of animal heat being influenced by the nerves

In this communication Sir Everard gives an account of a repetition of his former experiments upon the effect of dividing the nerves that supply the velvet of the deer’s horns, and in which some sources of error have been avoided. The general results are the same as those formerly obtained; the temperature of the horn, the nerves of which were divided, was diminished to the amount of 7°; and, as before, the disparity of temperature gradually decreased until, after the lapse of about twelve days, the temperatures of the two horns were the same. Upon examining the structure of the parts after the animal’s death, it was found that the interval between the divided ends of the nerves was filled up by a newly-formed connecting substance, capable of restoring their action. In further illustration of the effect of the nerves in producing heat, independent of mere circulation of blood, the author mentions a case of aneurism, in which the femoral artery was tied without occasioning any diminution in the temperature of the foot.