ANIMAL HEAT. 



rabbit in which artificial breathing was performed cooled only 

 4- ; while that which was left undisturbed cooled 7'5. 



Dr. Philip afterwards took pairs of rabbits, killed them in the 

 same way, and then in one experiment destroyed the brain and 

 spinal marrow of one with a wire, while he left the other untouched : 

 in another experiment, precisely similar, he inflated the lungs of 

 both. Yet, in each experiment, they both cooled equally. In a 

 third, the brain and spinal marrow of one only was destroyed, 

 and the lungs of both inflated. These, too, cooled equally. 



The temperature of foetuses born without brain is maintained 

 during the few days they may live. 



Professor Rudolphi remarks that the temperature of animals 

 bears no proportion to their nervous system : that, if it did, man 

 should be warmer than any brute ; the mammalia much more so 

 than birds; fish much more so than insects; and birds and am- 

 phibia nearly upon a par ; all which would be the reverse of 

 fact. t> 



Vegetables have a tendency to preserve a peculiar temper- 

 ature, yet they have no nervous system. 



But that the nervous system affects the temperature is certain. c 

 A passion of the mind will make the stomach or the feet cold, or 

 the whole body hot. Paralysed parts are often colder than 

 others, or, more properly, are more influenced than others by all 

 external changes of temperature. d But every function is affected 

 by the mind, though not dependent upon the brain for its regular 

 performance : and in varieties of temperature, both by the state 

 of the mind and by paralysis, there is, as far as we can judge, a 

 commensurate affection of the local circulation. Parts heated by 

 any passion are also red, and vice versa ; and paralytic parts must 

 have imperfect vascular functions, in some measure, at least, 

 from the want of the compression of the vessels by muscular 

 action, and of the general excitement by volition; they waste, 

 and sometimes inflame and ulcerate, or slough, on the slightest 



b Grundriss der Physiologic, 150. 



" I have formerly treated at some length of the influence of the nervous 

 system upon animal heat, in my Specimen Physiologies Comparatce inter animantia 

 calidi etfrigidi san^ninis. 1786. p. 23. 



See the same confirmed by many arguments in Magn. Strom, Theoria inflam- 

 mationis doctrines de calore animali superstructa. Havn. 1795. 8vo. p. 30. sq. 

 and by the much-lamented Roose, Journal der JErfindungen, $c. t. v. p. 17. 



Consult also Dupuytren, Analyse des Travaux de flnstitut, 1807, p. 16." 



d Dr. Abercrombie, Edin. Med. and Surg. Journal. 



