64 THEORY OF FEEDING. 



not always the same significance. The following table is taken 

 from Warington's Chemistry of the Farm. We see from it 

 that as a rule the percentage of albuminoids is considerably 

 in excess of that of amides. 



PROPORTION OF ALBUMINOID NITROGEN IN VARIOUS FOODS PER IOO 

 OF TOTAL NITROGEN. 



Oats .......... 94 



Maize .......... 94 



Barley .......... 95 



Wheat 88 



Beans 89 



Peas 89 



Wheat bran 85 



Brewers' grains ........ 95 



Rice meal ......... 92 



Linseed cake . ....... 95 



Grass, young ......... 75 



Clover, young ......... 7 



Meadow hay ......... 87 



Clover hay ......... 81 



Oat straw 88 



Barley straw ......... 90 



Carrots 58 



Turnips .......... 49 



Carbo-hydrates are a group of bodies which, in addition 

 to at least 6 atoms of carbon, contain oxygen and hydrogen 

 in the same proportion as water (H 2 O). Starch (C 6 H 10 O 5 ), 

 grape sugar (C 6 H 12 O 6 ), and cane sugar (C^H^O^) are 

 the principal soluble carbo-hydrates in plants. The propor- 

 tion of starch is far higher than that of sugar in all kinds of 

 ordinary fodder. The substances which are classed together 

 as carbo-hydrates, differ a great deal from each other as 

 regards their feeding value. 



" Starch occurs mainly in the form of granules, which differ 

 much in different grains both in size and shape, and, it must 

 be added, in their rate of digestion. Uncooked maize-starch 

 and oat-starch are very quickly turned into sugar by the 

 digestive ferment of the saliva or by the diastase of the 



