some Experiments in Climatological Physiology. 347 



The equation which gives the calculated results, found by 

 the method of least squares, is 



E=40'39 + 0-166 T£ 



When the intrinsic discrepancies are considered (see Table I.), 

 this result is eminently satisfactory. Hence, taking the 

 total group and solving the system of 26 equations by the" 

 method of least squares, for a' and V in (19 a) we obtain 



E = 43-8 + 0-154 Tf. (20) 



The results are shown in column (9) :of Table L, and agree 

 remarkably well with the observed results, and may be taken 

 as generally representing them. Thus with the present data 

 formula (19 a) may be regarded as quite satisfactory for the 

 ao-oreo-ate loss. 



13. Losses of Water and Carbon Dioxide. 



In order that a mass such as the human body shall main- 

 tain a sensibly uniform temperature, its thermogenesis and 

 thermolysis must be in continuous adjustment with external 

 changes of temperature and with other conditions affecting 

 the rate of loss of heat energy by convection, by radiation, 

 and by evaporation, etc. The physical conditions are such 

 that it can be anticipated a priori, on grounds indicated by 

 Professor Osborne, that variations will be exhibited more 

 markedly in what may be called the external losses, than in 

 what may be called the internal losses, and particularly than 

 in the loss of water and carbon dioxide from the lungs and 

 respiratory apparatus. The latter, indeed, shows a remark- 

 able constancy as regards both temperature and dryness, and 

 it may be pointed out that in the results, for subjects 

 weighing respectively 68 and 46 kilograms, the weight 

 appeared to be without influence. While this, of course, is 

 accidental, it discloses the fact that the lung losses must 

 not be assumed to stand in any constant relation to the 

 weight. 



The following table shows the results tabulated in the 

 •order of temperature (p. 348) : — 



