Apr. I. :9i8 Basal Katabolism of Cattle and Other Species 55 



COMPARISON OF SPECIES 



Summarizing the foregoing means from the different species affords 

 the comparisons of Table XI. Considering the nature of the results, 

 they show a rather striking degree of uniformity and tend to confirm 

 the conclusions of Voit (20) that the basal katabolism of different species 

 of animals is substantially proportional to their body surface. It may 

 be surmised that the exceptional result with the hog may be due to 

 the imperfect data available for computing the body surface of this 

 species. 



Table XI. — Mean daily basal katabolism per square meter of body surface 



Species. 



Basal 

 katabolism. 



Men (complete muscular rest). .. . 

 Women (complete muscular rest). 



Cattle (lying) 



Hogs (lying) 



Horse (standing quietly) 



Calories. 



935 ±5 

 886 ±6 

 964 ±24 

 i,078±? 

 948 ±? 



SUMMARY 



(i) The results of 27 determinations of the daily basal katabolism of 

 unfattened cattle of different weights and ages are reported. 



(2) The basal katabolism, whether computed lying or standing or for 

 an equal proportion of each, was equally well correlated with the esti- 

 mated body surface and with the live weight. 



(3) The basal katabolism per unit of body surface showed considerable 

 variability and a positive correlation with the live weight. 



(4) The mean basal katabolism lying, standing 12 hours, and standing 

 24 hours was in the proportion of 100:121 :i4i. 



(5) The mean daily katabolism of a 1,000-pound, unfattened steer 

 standing 12 hours out of the 24 is computed to be 5,918 ±60 Calories. 



(6) Experiments upon man have given results regarding the correlation 

 between basal katabolism and weight or body surface which substantially 

 correspond with those upon cattle. 



(7) The mean daily basal katabolism per square meter of body surface 

 appears not to differ greatly in man, cattle, swine, and horses under 

 comparable conditions. 



LITERATURE CITED 

 (i) Armsby, H. p. 



1912. THE MAINTENANCE RATIONS OF FARM ANIMALS. U. S. Dept. Agr. BuT, 



Anim. Indus. Bui. 143, nop. 



(2) 



1917. THE NUTRITION OF FARM ANIMALS. 743 P-, 45 fig- New York. 



