40 Dr. Chossat on the Influence of [July, 



Exner.5 0-09° 



Exper. 6 0-25 



Exper. 7 0-45 



Average O^G 



Comparing this average with that of the Experiments 2, 3, 

 •and 4 (which we have found to be 2-45°), we see that the animal 

 heat diminished 10 times more rapidly in these last experi- 

 ments. The influence of the par vagum cannot, therefore, 

 explain the quickness of the refrigeration occasioned by acting 

 upon the brain ; which conclusion is also confirmed by the 

 result of the fourth experiment, in which we have seen the 

 animal heat diminish rapidly, though the respiration was per- 

 formed freely. 



For the second part of the experiments, however, we do not 

 find more than this difference in the average refrigeration, as it 

 appears from the following table, which comprehends both the 

 section of the par vagum, and the refrigeration after death : 



Average refrigeration. 

 (Second part of exper.) 



Exper. 1. (Refrigeration after death) — .... 1-11° 



Exper. 5. (Section of the par vagum) l - 06° .... — • 



Exper. 7. (Section of the par vagum) 1*47 .... — 



Average 1-26 1*26 



I conclude then that after the section of the eighth pair, the 

 production of animal heat is yet taking place, though in a dimi- 

 nished proportion, as long as the temperature of the body remains 

 higher than about 32°, but below this point, the animal cools as 

 if it were dead. 



I pass now to the second cf the two queries proposed. 



II. Influence of the Spinal Marrow on Animal Heat. 



(a.) Sections of the Cervical Part of the Spinal Marrow. — All 



the sections performed on this part of the spinal marrow pre- 

 sented the same results, whether artificial respiration was per- 

 formed, as in the superior intervertebral spaces; or the respira- 

 tion was quite free, as in the inferior of these spaces. It will be 

 sufficient, therefore, to present in this extract one only of these 

 experiments. 



Exper. 8. — Section performed between the last cervical and 

 the first dorsal vertebra. Death the 10th hour at about 24°. 



4().qo 32-3 ° 



Average refrigeration = ~ — = 2*80° 



As it appears from this experiment, we find in the whole 

 length of the cervical part of the spinal marrow the same average 



