70 



TEMPERATURE FLUCTUATIONS IN THE HUMAN BODY. 



Experiment of March 10, 1911, with J. J. C. The deep and the shallow 

 rectal thermometers were used at a depth of 15 centimeters and 11.5 centi- 

 meters, respectively. A thermometer was also placed in the left axilla, this 

 cavitjr having been previously heated by a hot-water bottle at a temperature 

 of 42.5 C, and intermittent observations were also taken in the mouth. The 

 influence of muscular activity was studied in this experiment, and beginning 

 at 3 h 26 m p. m. the subject exercised quite vigorously. This activity appeared 

 to tire him, as he breathed heavily and perspired freely. During the exercise 

 he was more or less exposed, as he wore a blanket over his shoulders instead 

 of a sweater. At 3 h 49 m p. m. he stopped exercising and became quiet. For 



37 8C 



37.6 



37.4- 



37.2 



37.0 



36.8 



36.6 



36.4- 



36.2 



360 



3S.8 



2.10 RM. 230 2.50 



3.10 



3.30 



3.50 4.10 



4-.30 4-.50 



Fig. 37. Temperature curves for experiment of March 10, 1911, with J. J. C. 3.26 p. m. to 3.49 p. m., 



muscular exercise. 



some unaccountable reason there was not a very close parallelism between 

 the two rectal records, although all of the curves show a general tendency 

 toward parallelism, especially the curves of the rectal and the axillary temper- 

 atures. The muscular exercise did not produce a rise in the temperature; 

 while this is not easy to explain, it may have been due to the fact that the 

 surface of the skin was more exposed during the exercise than when the sub- 

 ject was quiet, causing a tendency to cool the surface. 



The curves showing the measurements of the body-temperature in the 

 different localities may be found in fig. 37. 



Experiment of March 13, 1911, with F. A. R. In this experiment both deep 

 and shallow rectal temperatures were taken, also the temperature of the left 



