THE TONER LECTURES. 



becomes manifest, and the table shows with what great regu- 

 larity the pulse rises with the temperature. 



In regard to animals, then, our second proposition has been 

 actually determined to be true by rigid experimentation ; in 

 regard to man, it is, of course, from the nature of the case, 

 impracticable in a Christian country to make an actual demon- 

 stration, but it is, humanly speaking, a scientific impossibility 

 that the proposition be other than true. 



The proof of the third proposition is contained in the follow- 

 ing experiment, which I have repeated several times with simi- 

 lar results : A rabbit was placed in a heated atmosphere, and 

 allowed to remain there until consciousness was entirely lost. 

 He was then taken out and plunged into a bucket of cold 

 water. The temperature of the body fell very rapidly to the 

 normal point, that of the water rising two degrees, and con- 

 sciousness returning so soon as the body was cooled. In a few 

 minutes the rabbit was able to walk, and the next day had 

 entirely recovered. A few moments' more exposure to the 

 high temperature would have killed the animal; undoubtedly, 

 the consciousness was suspended by the action of the heat 

 upon the brain, and undoubtedly it was restored by a with- 

 drawal of that heat. 



I have been so fortunate as to have the opportunity of ob- 

 serving in man a series of phenomena perfectly parallel to that 

 just narrated as occurring in the rabbit. 



I have a number of times, in typhoid fever with high tem- 

 perature, seen stupor, delirium, subsultus tendinum, etc., sub- 

 side under the use of packing in sheets wrung out of ice-water, 

 and the testimony of Jurgensen, Liebermeister, and others to 

 the same effect is simply overwhelming. The following single 

 instance of so-called cerebral rheumatism is so striking and 

 so demonstrative that it would suffice of itself at once to prove 

 and illustrate the proposition. 



Some time since, upon entering my ward in the Philadelphia 



