CORN Olh CAKE MEAE FOR PIGS 
141 
and economical aspects of the pig feeding game that we can come 
to a correct solution of our problems in practice. Both the *pig 
and the man must be considered. 
The comparison of the camouflaged Group II with Group 1 
shows that a hundred pounds of corn oil cake meal saved eightv- 
one pounds of corn and forty pounds of tankage, a total of 121 
pounds of feed concentrates. Counting the corn at $1.12 a bushel 
and the tankage at $100.00 a ton, current quotations in January, 
1918, this 100 pounds saved $3.62 of these feeds, or a ton was 
worth $72.40, substitutionally speaking. With corn at $1.68 and 
tankage at $100.00 a ton the corn oil cake meal substituted $4.43 
worth of corn oil tankage, or a ton of it was' worth $88.60 on this 
basis. 
Comparing Group III with Group I we find that a hundred 
pounds of corn oil cake meal saved 63.2 pounds of corn and 18 
pounds of tankage, a total of 81.2 pounds of these feeds. With corn 
at the lower price mentioned, a hundred pounds was worth $2.10; 
and a ton, $43.28. With corn at the higher price, a hundred pounds 
was worth $2.80 and a ton $55.92 — these figures on the substi- 
tutional basis. 
Now what happens when we add corn oil cake meal to hominy 
feed is shown in Groups IV, V and VI. In V we added it in the 
same manner as to II. In this case a hundred pounds of corn oil 
cake meal mixed with tankage in the proportion of 3 to 1 and fed in 
conjunction with hominy feed as compared to hominy feed and 
tankage saved 82.7 pounds of corn and 24 pounds of tankage, a 
total of 107.6 pounds, not quite so good a showing. With corn at 
$1.12 and tankage at $100.00 a ton, a hundred pounds of corn 
oil cake meal was worth $2.85 and a ton was worth $57.08. With 
corn at $1.68 and tankage at $100.00, a hundred pounds substi- 
tuted $3.68 worth of these feeds, or a ton substituted $73.62 worth. 
Where corn oil cake meal was fed “Free-Choice’’ style in 
Group VI as compared to none being fed in Group IV there was 
a minus value for the corn oil cake meal. Just what the signifi- 
cance of this is we do not know but we hope to repeat the test 
and see if it will check. We are inclined to believe that this par- 
ticular group for some reason was not quite so efficient even though 
scrupulous care was taken to divide all equally. These suspicious 
discrepencies happen even though all care and precaution is taken 
to divide the groups equally. We find inherent differences. It is 
up to the experimentalist to determine what these differences are, 
and what causes them, and to learn the remedy. So long as they 
