38 Dr. Chossat on the Influence of [July, 



limits of < 09 |° %~a \ we find, according to the preceding date, 



8-3-3 



Average refrigeration, first limits = — , = 2-37° perhoram 



second limits = -=— = I'll perhoram. 



After these preliminaries, I enter upon the proper subject of 



the paper. 



To Mr. Brodie's experiments, the following objections might 

 be made: 1. That pulmonary inflation after decapitation is a 

 cause of refrigeration capable alone of killing the animal. 

 2. That the section of the par vagum, and consequently the 

 decapitation, produces an infiltration of the lungs which alters 

 the chemical processes of respiration. It is necessary, there- 

 fore, to examine what effect such wounds of the brain which 

 do not interrupt the respiration would produce, and still leave 

 the lungs under the influence of the par vagum. I succeeded 

 by the following experiment : 



" Exper. 2. — A vertical section of the brain was made a little be- 

 fore the pons varoli : spontaneous respiration : death the 12th 

 hour, with all the signs of death by cold. The animal heat 

 descended from 40° to 24°, but in a progression a little different 

 from that of the refrigeration after death (Exper. 1), as shows 

 the determination of "the average refrigeration between the 

 limits chosen for the first experiment. I find in the second 

 experiment : 



4o-o°-3i-7 8 o noo i. 



Average refrigeration = — - h -^r, = 2-93 per horam. 



gh 30' 



31-7° - 2f4-0° 



Oh 



= 085° per horam. 



Exper. 3. — Violent commotion cf the brain followed by a 

 complete loss of sensibility, and the cessation of respiration. 

 Artificial inflation of the kings during the whole experiment. 

 Death the I lth hour at 22-3°. 



Average refrigeration = — — —, — Z it . 



3" 50' 

 31-70 23-9° 



Tjh 



= 1-30°. 



Opium acting especially on the brain, its influence on animal 

 lieat was tried in the following experiment : 



Exper. 4. — Injection in the jugular vein of 0*3 of grain of 

 crude opium boiled in 16 grammes of water. Death the 22d hour 

 at 22-8°. 



a V *• 39-80 -31-9° 



Average reingeration = — ^~~§o< = * *** ■ 



31-9° - 23-9° ...no 

 IJTy = U od . 



