ENERGY VALUES OF RATIONS FOR FARM ANIMALS. 27 
It is evident, however, without going through the labor of compu- 
tation, that while corn meal and wheat middlings may be used in the 
ration, neither will supply enough protein if used exclusively. Of 
the available feeding stuffs which are rich in protein and which may 
therefore serve to balance the deficiency of this ingredient, gluten 
meal is relatively the cheapest, and cottonseed meal comes next. 
While the difference between the two is not great, we shall naturally 
try the cheaper one. It is not difficult to determine by a few trials 
that 24 pounds of corn meal and 34 pounds of gluten meal, in addi- 
tion to the coarse fodder available, will give a ration corresponding 
very closely to the requirements, as the following table shows: 
Total dry | Digestible| Net 
Kind and amount of feed. matter: protein: g 
Wonmsilaceso Am OWMC See see ye er nee dels etie Scie ccc we cece cence Sine ala 2 
Glmemitn aoipounds: wi Meee ee Nee 6.97 39 3.09 
Corambnre alee OUI Sai eee cin ae ec cicieinin lois cle sie scinelneoe sie = = 2. 22 16 2.22 
Ciluitemsice Geiss) OU Aste. eae Sepa pe ici irici/= ciciainieis cls sisi lo sas ciclemas cli- 3.18 98 2. 95 
: Bat tees eee 20.79 1.72 13.35 
This ration shows as close an agreement with the computed protein 
requirement as could be desired, but contains a slight surplus of energy. 
The comparatively low figure for dry matter indicates that more 
coarse fodder might have been used had it been available, with the 
probable effect of cheapening the ration. As it is, we have used the 
feeds relatively lowest in price and apparently have a very economical 
ration. 
Cottonseed meal, however, is nearly as cheap as a source of energy 
as gluten meal, while it contains considerably more protein. It 
seems worth while, therefore, to see whether it may not be possible 
to secure the necessary protein more cheaply by using a smaller 
amount of the former feed in place of the gluten meal. Three pounds 
of cottonseed meal will supply almost exactly the same amount of 
protein as 34 pounds of gluten meal. Making this substitution, the 
ration stands as follows: 
: Total dry | Digestible 
Kind and amount of feed. maaceen protein. energy 
Pounds. Pounds. Therms. 
TAS STL yx) TOY a 0 sh ea a ag eg 8. 42 0.19 5.09 
Clover hay, 8 pounds.....---.....--..--- Beutel ee ee ATE SS 6.97 .39 3.09 
Wormpuiea ly 2 MOUNOTS 2s ee Te a eek Ose Sli eee eoene 2.22 16 2522 
ED LOMsecO MON MOUNGS 22 266 Soa ae ie ss eee Soe aces PtH 96 2.70 
