266 



Basal MefahoUsm of Sivine 



against the hog's age in days. It appears that at the end of the experiments 

 age had almost ceased to have any effect. 



Wi' liave ne.xt to correct all the metabolisms in the sixth column of 

 Table 11 to some one date. It is immaterial what date is chosen. The 

 writers have selected March 22 when the hog was 420 days old. 



The corrections to be added or subtracted are given in the eighth 

 column of Table II. In making these corrections it has been assumed 

 that the effect of increasing age on the curve connecting metabolism 

 and temperature is to cause it to move bodily downwards always keeping 

 the same shape. It may be that it would be more correct to assume 

 that the various points on the curve move downwards in the same 

 proportion. 



2 4 6 8 10 12 14 16 18 20 22 24 



Degrees Centigrade 

 Fig. 4. 



The writers see no adequate theoretical reason for preferring either 

 of these methods to the other. For the present purpose it makes very 

 little difference which method is used. The point might be worth in- 

 vestigating experimentally, but it would be difficult to secure the 

 necessary accuracy. 



We have finally the coi-rected values of the basal metabolism shown 

 in the last column of Table II and plotted against temperature in Fig, 4. 



The points fall very well on the curve with the exception of that at 

 16"9° which is 6J percent, too high. The writers are unable to account for 



