June i, 1921 
Effect of Ration on the Development of Pigs 
3i3 
The milk albumin obtained from 3 pounds of milk was fed for each 
pound of corn. The seventh day means that com was fed alone for six 
days and on the seventh day the total protein from 3 pounds of milk 
or the casein equivalent was fed for each pound of corn. These small 
amounts of supplementary protein, from one-eighth to one-tenth of the 
total protein furnished, resulted in a ratio of protein storage of 1 to 5.11, 
as compared with 1 to 7.5 when corn was fed alone. 
PROTEIN STORED WHEN CORN WAS SUPPLEMENTED WITH A MEDIUM 
AMOUNT OP PROTEIN FROM MILK 
There were two pigs fed proteins from milk in medium amounts. One 
was fed the casein from 1.5 pounds of milk for each pound of corn. 
This ration is designated com and casein 1 to 1.5. The other pig was 
fed casein in such amounts that the nutritive ratio which at first was 1 to 
3 was gradually widened until it was 1 to 8. The amount of protein 
from milk supplied to the pig fed corn and casein 1 to 1.5, was nearly 
two-sevenths of the total, and the other pig received nearly one-third 
of his protein from milk. These two pigs stored protein in a ratio half 
as wide as those pigs fed corn alone. This proportion of protein from 
milk was more efficient than greater or smaller amounts. Figures on 
the feed and growth of these two pigs showing the ratio of the protein 
stored to the protein consumed are shown in Table X. 
Tabl,E) X.— Relation of protein stored to protein consumed 
Experi¬ 
ment No. 
Protein 
stored. 
Protein consumed. 
Ration. 
From 
corn. 
From 
milk. 
Ratio. 
VI. 
Com and casein, 1: 1.5. 
Pounds. 
21.47 
21. 45 
Pounds. 
5!-°3 
53'°7 
Pounds. 
20. 81 
25.84 
T * 2. 'I A 
VI. 
Com and casein decreasing. 
* o’ « 3 *r 
i: 3*70 
PROTEIN STORED WHEN CORN WAS SUPPLEMENTED WITH A LARGE AMOUNT 
OF PROTEIN FROM MILK 
There were five pigs fed protein from milk in large amounts. The 
term milk protein here means both the casein and the albumin in the 
proportion in which they occur in milk. The milk protein or the casein 
from 3 pounds of milk was fed for each pound of corn. The milk albu¬ 
min was fed in such amounts as to give practically the same amount of 
protein as the casein from 3 pounds of milk for each pound of corn. In 
experiment VI, the casein was fed so as to make a nutritive ratio of 
1 to 3.3 The figures giving the ratio of protein stored to protein con¬ 
sumed for these five pigs are given in Table XI. 
