DISCUSSION OF RESULTS. 73 



12. On drinking hot coffee, the body temperature was very slightly in- 

 creased. This is shown in figs. 28 and 35. 



13. Drinking cold water had a tendency to lower the body-temperature. 

 See figs. 36 and 38. This effect was not evident in the experiment repre- 

 sented by fig. 35, however. 



14. Muscular exercise produced a marked increase in body-temperature 

 in at least one experiment (see fig. 36), but was without effect in others (see 

 figs. 37 and 38). Of significance was the fact that while obtaining the' data 

 for fig. 37, the skin of the subject was more or less exposed to the air. 



15. The internal temperature of the body and that of the axilla, breast, 

 groin, hand, arm, and mouth, have a tendency toward parallelism. This is 

 evident in practically all of the curves, but is especially well shown for the 

 internal temperature and the axilla in figs. 20, 27, 33, 34, 36, and 38, although 

 in fig. 27 this is not true of the right axilla for reasons previously explained. 

 The parallelism is also shown for the internal temperature and the groin in 

 figs. 24, 25, and 31; for the internal temperature and the mouth in figs. 27, 33, 

 34, 36, and 38; and for the internal temperature and the upper leg in fig. 23. 



Finally, it can be stated that an examination of all the results obtained 

 show's in the temperature curves a remarkable trend toward parallelism, a 

 parallelism that would be exact, there is every reason to believe, if the ther- 

 mometers could remain in precisely the same position and if the cavities 

 could remain absolutely constant in their closure. We feel justified, there- 

 fore, in summing up this work by stating that, aside from the skin temperature, 

 a rise or fall in rectal temperature is accompanied by a corresponding rise or 

 fall in temperature of all other parts of the body. 



Nutrition Laboratory, Carnegie Institution of Washington, 



Boston, Massachusetts, July, 1911. 



