A STUDY OF FEVER. 25 



prove that the fall does not occur when the section is above the 

 yaso-motor centres, and consequently that it is directly con- 

 nected with the vaso-motor paralysis, and the consequent de- 

 rangement of the circulation. 



Tscheschichin states that in a single experiment, instead of 

 cutting the cord he divided the medulla oblongata at its junc- 

 tion with the pons, and that the rise of temperature was in 

 this case immediate, not preceded by a fall. Led by this I 

 have performed the following experiments. 



Experiment 6. 

 A large powerful mongrel dog. 



Time. Temp. Remarks. 



12. 102p 



12.20 Since last note have opened skull above the foramon 



magnum with a trephine ; in doing this I have un- 

 doubtedly wounded a sinus, as the dog has lost fully 

 J pint of blood, I have just severed medulla. 



Breathing regular. 



Thermometer put into abdominal cavity. 



Cardiometer inserted into femoral artery. Art. pres- 

 sure 75 ; upon galvanization of a sensitive nerve it 

 fell to 50. The pneumogastric nerves were now cut ; 

 pressure after this was 45-55 ; on galvanization of 

 a sensitive nerve the pressure rose to 65<^. The 

 breathing is now very much affected, and paralysis 

 both of sensation and motion is seemingly complete. 



Aidops^y. — Medulla oblongata divided at its junction with 

 Ihe pons. Cerebellum wounded. 



Experiment 7. 



A terrier bitch of moderate size and strength. Opened 

 skull. 



