OF ANIMAL HEAT. Ill 



of the latent heat which it had received: in this way is 

 our animal heat principally produced.* 



10*8. Its production and regulation, however, appear 

 much influenced by the secretion of fluids from the 

 blood, both those which are liquid and destined to 

 solidify by assimilation and nutrition, and those which 

 are permanently elastic. 



lb'9. Since those changes are effected by the energy 

 of the vital powers, the great influence of these upon 

 our temperature must be easily perceived, f 



170. Many arguments render it probable, that the 

 action of the minute vessels, and the conversion of 

 oxygenised into carbonised blood, are dependent 

 upon the varied excitement or depression of the vital 

 principle.' 



For the remarkable phenomena of the stability of 

 our temperature,]; (proved by the thermometer, and not 

 by the sense of touch, which may be fallacious) that 



* Hence the constant coldness of those wretched beings who lahour under 

 the Hue disease, which arises from a mal-confonnatioa of the heart. Some- 

 times the septa of the heart are imperfect, sometimes the aorta arises with the 

 pulmonary artery from the riyht ventricle, as in the tortoise. In such instances, 

 the chemical changes can take place in the lungs hut imperfectly. Among- 

 innumerable instances of this lamentable disease, suffice it to quote J. Aber- 

 r.cthy, Kurgical and Physiological Essays. P. ii. p. 158, and Fr. -Ticdcmr.rj], 

 Zoolng-ic. T. i. p. 177. 



f I have formerly treated of the influence of the nervous system upon nnimal 

 heat, in my Specimen Physiologic Comparafte infer cnimantin cclidi 3f frigidi 

 sangitinis. p. 23. 



See the same confirmed by many arguments in Magn. Strom's Theoria ijt- 

 fl(tt)*malionis doctrine? de calorc Animali xupentructn. fj.ivn. 1795. 8ro. 

 p. 30 sq. and by the much lamented Roose, Journal di-r Erjlndungen, &.. 

 T.v r p. 17. 



Consult also Dupuytrcn, Analyse des Travm/.r de FInstitiit. 1807. p. 16. 



J Sec Crawford, Philos. Trans, vol. Ixxi. p.ii. 



