42 PRINCIPLES OF FEEDING FARM ANIMALS 
. 
fluids of the animals and taken into circulation. This portion 
does not contribute to the maintenance or the growth of the body, 
and is of value to the animal only in so far as the heat generated 
by the fermentation processes helps to maintain an even body 
temperature. In spite of these errors to which digestion trials 
10 20 30 40 ‘$0 60 70 80 90 NUTRITIVE RATIO 
COTTON-SEED MEAL Us WW DELETE WY 112 
LINSEED MEAL PTITIATIIUIATIIIIRUIL MUU L5 
SOYBEANS ee : TLE 18 
DRIED BREWERS’ GRAINS WWM OY 2.3 
GLUTEN FEED UML LLL 2.4 
ae a 
COW PEAS YYW UML TLL ETE 3.1 
WHEAT BRAN WM 4.0 
ALFALFA HAY YUU 43 
WHEAT MIDDLINGS MAMMAL 46 
RED CLOVER HAY UW 5.9 
OATS ae 6.2 
RYE EI ZL ALLL TLR TOTO TLL 78 
BARLEY LL LE LLL Ws WU 8.0 
INDIAN CORN eee WW 99 
DRIED BEET PULP WMO OVWIB LU 1.9 
fu 
TIMOTHY HAY WU LL 16.2 
CORN STALKS WMO, 236 
OAT STRAW YM MM EL, 383 
SKIM MILK We 20 
COWS’ MILK 38 
PASTURE GRASS 45 
MANGELS 49 
RAPE 43 
TURNIPS 77 
CORN SILAGE 120 
meet PROTEIN CARBOHYDRATES ANO FAT 
Fig. 8.—Digestible components and nutritive ratios of common feeds, in per cent. 
are subject, the results obtained by them are of the greatest value 
to both the feeder and the student of nutrition problems. Until 
the latter part of the last century, our theories of these problems 
and the science of animal nutrition rested almost wholly on the 
knowledge of the feeding stuffs gained through chemical analysis 
and digestion trials, 
