RESULTS OF SOFT-PORK INVESTIGATION'S, Et 
35 
from moderately soft to extremely soft. In all cases definite softening 
was produced by the feeding of rice bran. 
Table IT. — Average weights, gains, days fed, gradings, and refractive index of 
fats on- 32 hogs fed rice bran, and tankage 
Item 
Missis- 
Arkansas, 
1924 
1925 
9 
6 
70.4 
82.8 
S 
S 
1. 4612 
1. 4599 
14 
17.2 
11.2 
16.2 
15 
9 
65 
43 
43 
25.7 
56 
56 
.77 
.46 
101.3 
98 
S 
S 
93 
6S 
1. 4617 
1. 4612 
1.4609 
1.4607 
Iberia, 1925 
Theria 1Q24 General average 
1 and summary 
Number of hogs 
Initial weight pounds.. 
Check pigs: 
Average grading ' 
Refractive index (back fat) 
Fat content of rice bram.per cent.. 
Fiber content of rice bran do 
Gain: 
Minimum pounds.. 
Maximum do 
Average do 
Number of days fed 
Average daily gain pounds .. 
Slaughter weight. do 
Grading: x 
Average 
Distribution 
Refractive index at 40° C: 
Back fat 
Leaf fat 
32 
7.25 
10, 58, IMS 
1. 4607 
1. 4603 
1. 4610 
1. 4605 
1 The initial letters = 0, oily; S, soft; MS, medium soft; H, hard. 
2 Actual minimum. 
3 Actual maximum. 
Another factor which probably contributed to the spread in the 
degree of softness of the various lots is illustrated by the two Iberia 
farm lots. The second lot was on experiment twice as long and 
gained nearly twice as much as the first lot. The grades and re- 
fractive-index yalues indicate that the second lot ayeraged the firmer 
of the two. It has been noted (4, p. 4?, 60) that rice polish with 
tankage and peanut meal in combination with corn (1 to 2 mixture) 
cause the deyelopment of a maximum softness which is followed by a 
gradual hardening as the hogs approach maturity. Since rice bran 
is so nearly like rice polish in composition, the behayior just out- 
lined is probably true also of the rice bran, but without much ques- 
tion would show up more definitely were the hogs in the other lots 
more comparable. As the results stand, the Mississippi station lot 
shows the maximum softness, with a gain of 43 pounds. The wide 
differences in softness at the start of the experimental feeding periods 
has probably accentuated the rise and fall in degree of softness 
associated with the gain. With the Iberia farm lots as a basis, it 
appears reasonably certain that a rise and later decline in softness 
does occur with increase in gain. 
The average on the 32 hogs fed rice bran given in Table IT are 
thought to be representative of results likely to be obtained under 
average conditions. The degree of softness at the start of the feed- 
ing period will influence the softness attained as will also the gain. 
The refractive index of 1.4610 on the back fat confirms the committee 
grading of soft. The refractive index is one point higher than ob- 
tained on 69 hogs fed rice polish (4, p. 4^). 
The conclusion has therefore been drawn (1) that " Rice bran 
and tankage self-fed free choice on rye pasture or in dry lot and 
