FEEDING OF ANIMALS. 



345 



mation of organic substance is to be considered the source of 

 muscular power, he considers that, in the first line, comes the 

 oxidation of non-nitrogenous matters, carbohydrates and fat } 

 in the second, the transformation of circulation-albumen ; and 

 lastly, that of the organised albumin, which is only attacked 

 if other matters are not available in sufficient quantity. 

 Further, he considers it is evident that the increased albumin 

 transformation was not sufficient to cover the requirements of 

 the increased work, and that this increased transformation, 

 and the loss of body-weight, show the insufficiency of the 

 food, and of the available fat of the body. 



TABLE 80. 



The table, in fact, does show that, with increased work 

 done, there was decline in body-weight ; and, assuming with 

 Kellner that there was a deficiency of food and of body fat, 

 it seems probable that the increased elimination of nitrogen 

 in the urine is the necessary coincident of real dilapidation 

 of the system. It is obvious that, so far as this is the case, 

 the results are not discordant with our own early view on the 

 subject, since fully established by others. These results of 

 Kellner's are, indeed, a confirmation of the view we put 

 forward in 1852, that " a somewhat concentrated supply of 

 nitrogen does, however, in some cases, seem to be required 

 when the system is overtaxed ; as for instance when, day by 

 day, more labour is demanded of the animal body than it is 

 competent without deterioration to keep up." 



In 1885 Grandeau and Leclerc published the results of 

 an experiment with a horse 1 of which the following is a 

 summary : — 



Nitrogen in urine for 100 in food. 



Best 62.4 per cent. 



Probable 

 explana- 

 tion of 

 Kellner's 

 results. 



Grandeau 

 and Le- 

 clerc 's ex- 

 periments. 



Walking 

 Trotting 



Drawing 



"Walking 

 Trotting 



67.7 

 64.9 

 60.9 

 59.2 



1 Annates de la Science Agronomique, 1885, 2 n »e annie, tome i. p. 326. 



