S T U I) Y I N M R 1) 1 1) A N I) X U i; .M A L P 11 Y S 1 O L (i Y. 



15 



If the animal be in a lieated room, breatliing licated air, the period of fall is a very 

 short one. In none of my own trials, however, and in none of those reported by 

 other observers, so far as I am aware, has the fall of temperature been altogether 

 absent. In the experiments of Naunyn and Quincke, although the animal was 

 put at once into a warm chest where the temperature was between 80^ and 90'' F., 

 yet it was always several hours before the normal temperature was reached. The 

 question here naturally arises, is the subsequent rise of temperature really due to 

 the division of the cord, or is it due simply to the external heat to which the animal 

 is exposed ] An experiment apparently crucial as to this point was performed by 

 Naunyn and Quincke. They first placed the uninjured animal in the warm box, 

 and when after some hours no rise of its bodily temperature had occurred, divided 

 the cord and replaced the animal in the warm chest, when intense fever came ou 

 in a very short time. Again these observers opened the spinal canal so as to com- 

 pletely expose the cord without cutting it, and placed the animal in the warm chest 

 for the space of ten hours ; at the end of this time the bodily heat had then risen 

 six-tenths of a degree only. The following day the cord was divided and the animal 

 replaced in the warm chest ; in the first twenty minutes the bodily temperature 

 fell nearly one degree, but rose three degrees in the next hour and twenty min- 

 utes, at the end of which time death occurred. 



This comparatively rapid rise of tenq)erature does not, however, always occur: 

 thus in an experiment of Henri Parinaud {<>p. cU.,v'i. p. 313), allhough the temperature 

 of the luiinjnred animal finally rose higher than tliat of the injured, it at first rose 

 more slowly. I have in a large nundjer of cases seen the rise of temperature pro- 

 duced by exposure of an animal with cut cord to excessive heat (Experiments 41 

 to 46, in my paper on Nitrite of Amyl, American, Joiini/d of the Mci/ic(tl Sciences, 

 July, 1871), but have performed only four experiments in which comparison was 

 made. 



Experiment 21. 



A bitch. 



EE.MAEKS. 



Rise of temperature 20.5 in Iiour ; average leiiiiii-rafuro of chest, SS'-'.SS. 

 Cord cut. 



Fall of temperature 0-.2r) iu one hour; aver.ige temperature of chest. 

 860.61. - 



A dog. 

 TiMK. TEMr. OP Chest. 

 12:51p.m. 890.33 F. 



1:05 9.3.6 



1:20 94.7 



1:35 94.7 



Rectal Temp. 

 103°.! P. 



Experiment 22. 



REMARKS. 



