ma:\^ual of cattle-feeding. 115 



grms. of carbon, tlien, 0.6 grms. were contained in the fle^h 

 laid on, leaving 14.1 grins., wliieli ninst Iiave been gained 

 as fat. But, as we have seen, one part of carbon is equiva- 

 lent to 1.3 parts of fat, and hence we have — 



U.Ox 1.3 =18.2 grms., 



the amonnt of fat gained. 



So, then, the resnlt of the ration of 1,216 grms. of haj 

 per day was, in this particular case, a gain bv the animal 

 of 12.5 grms. of albuminoids and ls.2 gnn>. of fat in 

 twentj-four hours. 



By a similar process the gain or loss of waf^'f by the 

 body can be determined, an<i thus the total gain or lo^s, as 

 shown by the live- weight of the animal from day to day, 

 can be analyzed, and we are enabled to say how nnich of 

 the gain which may he observed is the valuable flesh or 

 fat, and how much is due simply to a greater or less cjuan- 

 tity of water in tlie tissues, or of food and drink in the 

 intestines. 



The following table (p. 110) gives the detailed results <jf 

 the above experiment in the form of a balanee-^heet, and 

 will give some idea of the care and labor with which such 

 investigations are conducted. 



Any loss by the body is, of conrse, placed oji the '^con- 

 sumption" side of the account, and any gain on the '* pro- 

 duction" side. 



The Iiive-weight alone, although very vahiable for 

 many purposes, gives but a very imperfect idea of the 

 effect of a ration. The live-weight of an animal includes 

 not only the solid matter of its tissnes, but also water, the 

 food eaten, and the dung and nrine contained in the rectum 

 and bladder ; so that an increase of the live-weight by forty 

 or lifty pounds is capable of many interpretations. 



