1887] Physiology. . 307 
consisted of the following: Pen 1 (cheap food), corn meal cooked 
with twice its weight of skimmed milk, giving a nutritive ratio 
of 1:5; Pen 2 (rapid fattening), pea meal cooked with twice its 
weight of skimmed milk, giving a nutritive ratio of I: 2. 
(for lean meat), equal parts corn meal and pea meal sistas with 
an equal weight of whole milk, giving a nutritive ratio of I: 3.6. 
The nutritive ratio of the rations given st cig lot is very 
narrow, and that of the third, also quite narr 
n several occasions lack of food bilaostied the substitution 
of raw whole corn for meal and corn meal for pea meal; but the 
time was so short and consequently the amount of food not 
properly in the ration thus consumed was so small that it could 
not materially affect the results. 
e experiment extended through ninety-two days. The 
weight of the pigs and the gain in weight for = interval be- 
tween weighings are shown in the following ta 
| R 
/ j > 
sa lob Ss) 5s) Sel ok | SS] sei es] se] Os 
=| 25 | of of Ss as & o122 | Re ga 
z S S~ | #0 | cA | sA | SA 25 2a 2a Z> | sos 
<8 |g 3°) Ss] 35S] no | ae) Ss | Se] Be | Si 
Í & e < 5 
bs. | Lbs. | Lbs. | Lbs. | Lbs. | Lbs. | Lbs. Lbs. | Lbs. | Lbs. 
Weight... 212 | 450 | 504 | 532 coo | 638 | 642 | 655 
Pen 1 
Increase...... 238 54 28 28 38 4| 13% |4433 | 1.61 
a kone nea 194 | 434 | 476 | 520] 540) oo| 600] 606 
EN 2... 
esses. 240 42 44 20 60 o 6 | 2334 | 43535 | 1.59 
eight........| 192 | 366| 400 | 432| 438| 462| 474| 500 | 496% 
PEN 3..- | 
Increase...... 174 wi 33 6 | 24 12 26 | —3% | 30414 | 1.66 
Those fed upon corn meal and skimmed milk gained in flesh 
the most steadily. During the hot weather in July they all had 
variable appetites and gained little in flesh; those in Pen 3 lost 
three and one-half pounds during the last six days. 
By dividing the experiment into two sections of forty-two days 
each (for convenience in calculation, leaving out the eight days 
from June 8 to 16, in the middle), it will be seen that much the 
larger part of flesh was laid on during the first half of the trial : 
Pen r. | PEN 2. PEN 3. 
| 
First ue | Blew Last First | Last 
42 Days. | 42 Days. | 42 ide Boag Days. | 42 Tade @ Days. 
Gain in flesh—Pounds......| 238 | 1513¢ | 240 | 153% | 174 | 9634 
The cost of the food eaten by the pigs in Pen 1 and in Pen 2 was 
greater during the last than during the first forty-two days, —i.e., 
