416 



FATTY ELEMENTS OF FOOD, AND ON FAITENING. 



enters into a given ration. Let us take that given to the horse? in 

 experiment 3d, in which the half of the hay was replac-'id by pot\- 

 4X)es, one of the articles that contains the smallest proportion of liu«*J, 

 and we find in the 



26.6 lbs. of hay 632.9 grs. phosphoric acid and 1867.9 grs. of liire. 

 30.8 lbs. potatoes 387.7 " 37.0 



1020.6 



1904.9 



numbers which correspond with 1798.5 grains of bone earth, \' 

 078.7 grains of uncombined lime. 



In his usual allowance a work-horse at Bechelbronn receives : 



Hay 22 lbs. containing 524.8 grs. phosphoric acid, and 1543.8 grs. of lime. 



Straw 5.5 " 60.7 



Oats 7.2 " 230.2 " 



81.57 



In other words, 1735 grains of bone earth, and 864 grains of fret 

 lime. 



I have found that very young foals, growing rapidly, and weigh 

 ing about 374 lbs., consume per diem : 



'-«-« Hay-  . • J9.8 lbs. containing of phosphoric acid 463 grs. : lime 1389 grs. 

 Oats... 75 " " 231 " 58.6 



which represent 95 of bone earth or subphosphate of lime. As a 

 consequence of the relation which appears to exist between the 

 azote and phosphoric acid of an article of sustenance, it comes to 

 pass that like nutritive equivalents also indicate like proportions of 

 phosphoric acid ; so that by introducing a suitable quantity of hay or 

 clover, articles that abound in lime, into the ration, we are always 

 certain of having food favorable to the development of the osseous 

 system, whatever the nature and quality of the other articles that 

 enter into the constitution of the allowance. 



The relation of the phosphoric acid to the azote approaches the 

 ratio of 3 to 10. in the more ordinary articles of forage ; but the 

 same relation is no longer apparent in the cereals and leguminous 

 vegetables ; in grain and in peas, beans, &c., the phosphoric acid 

 amounts to about a fourth of the azote contained. Thus we have : 



Theoretical 

 equivalent. 



100 



Hay 



Potatoes 320 



Beet 548 



Turnip 885 



Jerusalems 273 



Dry clover 75 



Wheat-straw... 235 



Phosphoric 

 acid in the 

 equiralent. 



0.34 



0.35 



0.28 



0.31 



0.37 



0.S4 



0.37 



Theoretical 

 equivalent. 



Oat-straw 380 



Oats 68 



Maize 70 



Wheat 43 



Peas 25 



Haricots 27 



Beans 23 



Phoiphone 

 acid in the 

 equivalent. 



0.40 



0.32 



0.38 



0.41 



0.23 



0.25 



0.24 



^ in. OF THE FATTY CONSTITUENTS OF FORAGE : CONSIDERATIONS ON 

 FATTENING. 



When fat was observed accumulating in the tissues of the animal 

 body, and it was unknown that the presence of fatty matters in 

 plants is what may be termed a general fact, men naturally con- 

 ceived that the fat was produced from the food in the act of dige» 



