June i, 1921 
Effect of Ration on the Development of Pigs 
337 
the first 400 days of the experiment, it means that the protein was stored 
at a much wider ratio than 1 to 7 during this period. The detailed 
figures for the calculations by periods are found in Table XXIV. By 
dividing the calculated amount of protein stored into the amount con¬ 
sumed, we find that the ratio for the pig fed corn and ash was 1 to 17.61 
during the first 400 days and for the pig fed com and protein-free skim 
milk, it was 1 to 18.88. And for the pig fed corn alone it was 1 to 12.24 
for the first 600 days. This narrow ratio for this pig is due to the fact 
that this pig had a period of relatively rapid growth between the three 
hundredth and four hundredth day. During the rest of the life of these 
pigs they stored protein in a much narrower ratio. The average for the 
pig fed corn and ash was 5.37 for the last 500 days. For the pig fed corn 
and protein-free skim milk it was 5.96, and for the pig fed corn 
alone it was 5.15. While these figures are based on several assumptions 
founded on experimental evidence, it brings out this fact, that the best 
ratio in which protein was stored by these pigs fed corn was not far 
from 1 to 5. While this ratio is narrower than that obtained from pigs 
fed protein in abundance from other sources than corn, it is much wider 
than when corn was supplemented by a small amount of protein. The 
ratio for the pig fed com and casein, reducing (see section III), was 1 
to 3.7, the one fed com and casein from 1% pounds of milk for each 
pound of corn was 1 to 3.3, and that for the one fed corn, starch, 
casein, and ash was 1 to 2.9. 
Table XXIV. — Pounds of fat stored and thermal value 
PIG FED CORN AND ASH 
Period. 
Weight. 
Percentage 
of fat. 
Total fat 
in body. 
Fat stored. 
Therms in 
fat stored. 
Days . 
Pounds . 
Pounds . 
Pounds . 
0 to IOO a . 
56 
20 
II. 20 
2. 80 
II. 76 
IOO to 200. 
65 
20 
13.00 
I. 80 
7- 56 
200 tO 300 . 
53 
20 
IO. 60 
— 2. 40 
—10. 08 
300 to 400. 
60 
25 
15. OO 
4. 40 
18. 48 
400 to 500. 
87 
30 
26. IO 
II. IO 
46. 62 
500 to 600. 
*3 1 
40 
52.40 
26.30 
no. 46 
600 to 700. 
168 
45 
75. 60 
23.20 
97- 44 
700 to 800. 
269 
47 
126. 43 
50-83 
213.49 
800 to 900. 
383 
5o 
I 9 I. 50 
65.07 
273.29 
900 to 923. 
394 
52.5 
206. 85 
r 5- 35 
64. 47 
Total. 
200. 85 
