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EUGENE F. DU BOIS 



communication the rising temperature is usually accompanied by an 

 increasing heat production which outweighs the increasing heat elimina- 

 tion. (Fig. 2.) 



In some cases in spite of a rising temperature the heat production 

 remains constant, having established itself at a level considerably above 

 that of the heat elimination. (Fig. 3.) In one notable exception (Fig. 3, 

 Morris S., Oct. 24), there is a rapid decrease in heat production during 

 the second and third hours when the average body temperature is rising 

 and the rectal temperature seems to have reached its zenith. 



Fig. 4. Typhoid patients showing differences in the change in the rectal tempera- 

 ture and the average body temperature. 



In most cases the rectal temperature and average body temperature 

 rise at about the same rate but several experiments show that the rectal 

 curve may fall while the body is still growing warmer. (Fig. 4.) 



At the time when the temperature approaches its peak the skin and 

 extremities are becoming warmer until they almost attain the heat of the 

 internal organs. With the skin flushed and the arterioles dilated the 

 blood begins to cool oif the internal organs until they approach the tem- 

 perature of the cooling surface. 



The fall in temperature is caused by a rapidly increasing heat elimina- 



