290 



TEMPERATURE AND HUMIDITY 



calorimetry, however, it is not difficult to 

 predict the relations that will obtain in a 

 given set of circumstances. 



Changes in Heat Exchange with Varying 

 Environmental Temperature 



The fundamental heat phenomena in- 

 volved in temperature adaptation in the case 



of man as analyzed by the application of 

 equation 13 are illustrated by such a graph 

 as that presented in Fig. 5. The particular 

 studies concerned included 35 different series 

 of experiments with a single nude subject, 

 observed in the semi-rechning posture. The 

 abscissa represents operative temperatures, 

 and the ordinate represents heat gain above 



• TOTAL METABOLISM 



• HEAT CHANGE 



o RAD. AND CONVEC. 

 • EVAPORATION 



Fig. 5. General diagram of heat loss. Factors in the resting heat balance between the unclothed 

 human body and its environment at various operative temperatures as determined by partitional 

 calorimetry. Ordinal values of lower curves have algebraic sum equivalent to ordinal value of metab- 

 olism at a given abscissa value. 



