HEAT 



313 



Fig. 148. Eate of heat loss in successive periods of 0.25-hour. One rabbit in a 

 calorimeter at 23° C. Sensible loss is the heat picked up by the calorimeter; latent loss 

 the vaporization equivalent of the moisture picked up by the air. Mean differences 

 between successive periods are represented by the small rectangles; they vary only be- 

 tween 8 and 13 per cent of their means. Data of Gasnier and Mayer ('34, p. 220). 



does more smoothly but independently. These inferences are sus- 

 ceptible of further investigation ; at present the conclusion might 

 be that: using small variability as one criterion of independence 

 and large variability of dependence, then heat gain appears to be 

 the more independent variable. 



By the same criterion, and to a greater degree, losses by vapor- 

 ization which fluctuate by ± 14 per cent (table 36), contrast with 

 sensible losses which are relatively stationary, varying ± 5 per 

 cent. Perhaps the former is compensating the ineptitudes of the 

 latter. 



From the same data for rates of heat exchange, it is possible to 

 find whether the ditferences between successive half-hours and 



TABLE 36 



Variabilities (coefficients of difference, CA) in rates of heat exchange, at intervals upon 

 single days. Babbit. Data of Gasnier and Mayer 

 ( '34, p. 153, 204, 206, 218, 



