290 
Journal of Agricultural Research 
Vol. XXI, No. 5 
weight is above 225 pounds the percentage of fat is higher than the 
percentage of moisture. Between these two limits the variation is 
irregular. If this irregularity is studied further it will be found that 
wherever the moisture content is higher than the fat content com has 
been supplemented by both additional protein and ash. When the fat 
content is higher than the moisture content the corn has been supple¬ 
mented only by one feed furnishing either additional protein or ash, or 
com was fed alone. This is readily seen by the figures given in Table IV. 
Table IV .—Percentage of moisture and fat in pigs of between 100 and 225 pounds weight 
MOISTURE LOWER THAN FAT 
Experi¬ 
ment No. 
Ration. 
Empty 
weight. 
Moisture. 
Eat. 
II . 
Com alone. 
Pounds. 
1 A.I. CO 
Per cent. 
23 . O 
Per cent. 
O 
IV. 
I°S- 25 
122. 80 
00 ' 
38.0 
35 -° 
3 S-o 
22. O 
4/* 
44.0 
jIC ft 
II. 
Com and ash. 
IV. 
Cora and protein-free skim milk. 
127. 45 
181. 00 
A *T 0 
IV . 
Com and milk albumin . 
4 /• u 
47.0 
A*1 O 
V . 
Com and casein, seventli day feeding 
139.84 
209.95 
00 • u 
33 * 0 
34 -o 
IV . 
Com and milk protein, seventh day feeding . 
4 6 m 0 
51.0 
MOISTURE HIGHER THAN FAT 
V. 
VI 
VI 
VI 
VI 
VI 
Com and com germ. 
Com, starch, casein, and ash.. 
Corn, casein, and ash 1 to i l A . 
Com, casein, and ash 1 to 3. 
Com, casein, and ash widening. 
Com, ash-free blood protein, and ash 
140.44 
40. 0 
33 -o 
I 59 - 35 
42. 0 
37 -o 
195. 66 
40. 0 
40. 0 
199. 71 
43 - 0 
40. 0 
192. 20 
42. 0 
41. 0 
156. 86 
46. 0 
39 -o 
All rations in which com was not supplemented by both protein and 
ash were either consumed in insufficient amounts or failed to produce 
growth when consumed in large amounts. If a ration is partially defi¬ 
cient, yet adequate for restricted growth, it produces a pig of abnormally 
high fat content. If the ration is so deficient that growth is very much 
stunted the moisture content is abnormally high. When pigs grew above 
200 pounds there was a regular and constant increase in percentage of fat. 
ASH CONTENT 
The figures for ash percentages on the basis of empty weight are plotted 
in figure 3. In pigs weighing less than 80 pounds the variation is very 
irregular. The two pigs fed on alfalfa pasture and the one fed com and 
protein-free skim milk had the highest percentage of ash. Among the 
pigs which weighed over 80 pounds and less than 210 pounds those fed 
com and corn germ, corn and casein every seventh day, and com and 
milk albumin in small amounts had the lowest percentage of ash. While 
