100 STORRS AGRICULTURAL EXPERIMENT STATION. 
if we would obtain the.largest yields of butter-fat from our milch 
cows. It would also, perhaps, be wiser until we have more light 
than we have at present upon this matter, to make our rations 
larger, so far as their total energy is concerned, than that of the 
German standard. The size of the ration suggested by the 
Wisconsin Station as a standard ration may, when it is measured 
by its fuel value, not be too large for the demands of our 
conditions. Feeding stuffs rich in carbonaceous foods (fats and 
carbohydrates) are abundant and cheap with us, and it is difficult 
to utilize the foods ordinarily produced on the farm without 
making our rations larger in total energy than the German 
standard calls for. 
The use of fuel values gives a means of simplifying the calcu- 
lation of rations. It will be understood that the proportions of fats 
and carbohydrates are only relative, in other words, that one may 
be diminished if the other be correspondingly increased. If our 
theories are correct, the important matter is to provide sufficient 
protein and sufficient total energy without varying too much 
from the most desirable relative proportions of the fats and car- 
bohydrates. In other words, a daily ration for a milch cow 
(1,000 pounds live weight) which would furnish 2.5 pounds of 
digestible protein and enough digestible carbohydrates and fats 
to make up the 29,600 calories of energy, would satisfy the 
requirements of the German (Wolff's) standard, although the 
relative proportions of the carbohydrates and fats were not the 
same as called for by this particular standard. 
aR Ue 2 
German ( Wolff's) and Wesconsin Station Standard Rations, to- 
gether with Averages of 16 Rations here reported upon, 
and a tentatively suggested Ration. 

DIGESTIBLE NUTRIENTS. 





ORGAN- 3 
RATION Ic cS 
; : Carbohy- | Fuel |2 3 
MATTER| Protein. Kat By rs Valae 5 aa 
Wolft’s (German) Lbs. Lbs. Lbs. Lbs. Cal. eer ie 
Standard, - - 24.0 2.50 .40 12.50 29600 | 5.4 
Wisconsin Station 
Standard, 1893, - 25.6 2.30 .80 13.30 32200 | 6.9. 
Wisconsin Station 
Standard, 1894, - 24.5 215 74 13:27 31250 | 6.9. 
Average of 16 here 
reported, - - 26.4 2.48 -94 14.09 34800 | 6.5 
Tentatively suggest- 
ed ration, - - 25.0 2.50 |(.5 to. .8*) | (13 to 13*)] 31000") Be 

* See explanation on the opposite page. 


DME AE ASF AM CALS tna Pomel te BR. ost 
