14 
BULLETIN 378, U. S. DEPARTMENT OF AGRICULTURE. 
growing period the average weight of the pigs fed fish meal was 201.5 pounds, 
while that for the pigs getting the tankage supplement was 191.5 pounds, a 
difference of 10 pounds. From observation there could be noted no difference 
between the two lots with respect to growth in the way of general development, 
which would indicate that one ration was not particularly superior to the other 
in meeting requirements for growth in pigs. 
These same 12 pigs were used for the second period and were divided into 
lots and fed as follows: 
Lot No. 3, composed of the same four pigs as lot No. 2 (in the growing 
period), was continued on the same ration, which consisted of: 4 parts of 
corn meal, 4 parts of middlings, 1 part of fish meal. 
Lot No. 4. composed of four pigs from lot No. 1, was fed a ration of : 9 parts 
of corn meal, 1 part of fish meal. 
Lot No. 5, composed of four pigs from lot No. 1, was fed a ration of : 9 parts 
of corn meal, 1 part of tankage. 
RESULTS DURING THE FINISHING PERIOD. 
At the close of the 16 weeks' growing period the hogs were divided into 
different lots in order to have them as uniform as possible for the finishing 
period. Lot 2 in the growing period was lot 3 in the fattening period. This 
lot was fed the same ration as in the growing period — 4 parts corn meal, 4 parts 
middlings, 1 part fish meal. There are many farmers who feed the same ration 
both for the growing and fattening periods, and it was the intention to carry 
out such a scheme with this lot of hogs in order to determine the advisability 
of such a practice. 
Fattening period: May 11, 1915. to June 8, 1915 (28 days). 
Lot 3. — Ration: 4 parts corn meal, 4 parts middlings, 1 part fish meal: 
Duration of experiment days. , 
Pigs - number. 
Average first weight pounds. 
Average final weight do 
Average gain per pig do. . . 
Daily gain per pig do. . . 
Total grain fed do . . . 
Average grain eaten per pig daily do. . . 
Grain per 100 pounds gain do . . . 
Cost of 100 pounds gain dollars. 
Lot 4. — Ration: 9 parts com meal, 1 part fish meal: 
Duration of experiment days . 
Pigs number. . 
Average first weight pounds. 
Average final weight do 
Average gain per pig do 
Daily gain per pig do 
Total grain fed .' do . . . 
Average grain eaten per pig daily do. . . 
Grain per 100 pounds gain do. . . 
Cost of 100 pounds gain dollars. 
Lot 5. — Ration: 9 parts corn meal, 1 part tankage: 
Duration of experiment days. 
Pigs number. 
Average first weight pounds. 
Average final weight do . . . 
Average gain per pig do. . . 
28 
4 
201.5 
255. 25 
53. 75 
1.91 
903 
8.06 
421 
6.04 
28 
4 
191.5 
251. 75 
60.25 
2.16 
956 
8.54 
393 
. 5.35 
28 
4 
192.0 
248. 00 
54. 00 
