VARIATIONS OF TEMPER AT (JRE. 



327 



The mean height of all the temperatures taken during a day in a patient is 

 called the "daily mean," and according to Jaeger it is 37*13 in the rectum in 



Fig. 232. 



Variations of the daily temperature in health during twenty-four hours. L , 



after Liebermeister; J , after Jiirgen sen. 



health. A daily mean of more than 37*8 is a "fever temperature," while a mean 

 under 37*0 C. is regarded as a "collapse temperature." 



As the variations occur when a person is starved for a day although those that occur at 

 the periods at which food ought to have been taken are less it is obvious that the variations 

 are not due entirely to the taking of food. [The * indicates taking of food.] 



The daily variation in the frequency of the pulse often coincides with variation of the 

 temperature. Barensprung found that the mid-day temperature maximum slightly preceded 

 the pulse maximum ( 70, 3, C). 



If we sleep during the day, and do all our daily duties during the night, the 

 above described typical course of the temperature is reversed. With regard to the 

 effect of activity or rest, it appears that the activity of the muscles during the day 

 tends to increase the mean temperature slightly, while at night the mean tempera- 

 ture is less than in the case of a person at rest. 



