326 
Journal of Agricultural Research 
Vol. XXI, No. 5 
That is, for four therms consumed in the ration only one was stored in 
the form of protein or fat. The two continuation pigs stored energy in as 
efficient a ratio as the younger hogs. Since these two pigs did not make 
material gains for the first year of the experiment, it means that they 
must have stored energy in a more efficient ratio during the last year. 
CORN WITH ADDITIONAL PROTEIN 1 
The ratio for the pig fed com and corn germ was i to 3.36. This was 
wider than for any of the pigs fed additional protein, but narrower than 
for any pig fed corn alone. For the pig fed casein every seventh day 
the ratio was 1 to 3.13—wider than for any other pig fed protein from 
milk in addition to com. For the pig fed milk protein every seventh 
day the ratio was 1 to 2.43. This was the narrowest ratio for any pig. 
For the two pigs fed milk protein in medium amounts, one com and 
casein 1 to 1.5 and the other corn and casein, reducing, the ratios were 
1 to 2.50 and 1 to 2.47, respectively, or narrower than for any of the 
pigs fed milk protein in the larger amounts. The average ratio for the 
four pigs fed milk protein in large amounts was 1 to 2.63. From the 
standpoint of energy storage this larger feeding of milk protein was not 
as efficient as the smaller feeding of milk protein. The ratio for the pig 
fed com, starch, casein, and ash was 1 to 2.93. This was wider than for 
any pig fed milk protein in addition to com, except one fed casein every 
seventh day. For the two pigs fed black-blood albumen the ratio was 
1 to 2.58. In this case the ash had no influence. With the ash-free 
blood protein the addition of ash was a distinct advantage. Without 
the ash the ratio was 1 to 4.32, as wide as for corn alone. With ash 
the ratio was 1 to 2.54, as narrow as when large amounts of milk pro¬ 
tein were fed. 
This analysis shows that feeding com alone is not advantageous from 
the standpoint of energy stored. It also shows the distinct advantage 
of adding a small amount of protein from other sources. The pigs to 
whose ration from one-tenth to one-third of the total protein in the 
ration was from milk stored energy in as large a ratio as those whose 
ration contained over half the protein from milk or from other animal 
sources. 
CONCLUSIONS 
PROTEIN STORAGE 
1. Pigs fed on com alone store on the average 1 pound of protein for 
7.5 pounds of protein consumed, provided that before the pigs are put 
on the ration they have attained a certain development. 
2. When corn was supplemented with small amounts of protein from 
milk, from one-eighth to one-tenth of the total protein in the ration, the 
pigs stored 1 pound of protein for 5.11 pounds consumed. 
1 The five pigs which made a very small gain are not included in the discussion. 
