2 BULLETIN 21, U. S. DEPABTMEXT OF AGKICULTUEE. 
discussed in the following pages, and the complete details of each 
are recorded in Tables I to IV of the appendix at the end of the 
paper. The main object of the summary tables is to show the results 
according to length of feeding period, which varied from 6 to 21 days 
in Experiments A and D, from 9 to 18 days in Experiment B, and 
from 7 to 16 days in Experiment C. All the various kinds of birds are 
necessarily mixed together in showing these results, but the aver- 
ages for two of the main classes — broilers and roasters — -are shown 
^r>arately, irrespective of length of feeding period, at the bottom 
of each table. 
The actual cost of producing the gains in each case is given under 
each experiment, and as the price of grain and milk varied some- 
what in the different localities, the relative amount of feed required 
to produce a pound of gain is used in comparing the efficiency of the 
rations and the methods at the different stations rather than the 
cost of the gains, except where different feeds are used. 
PRICES OF THE FEED USED. 
Before describing the feeding operations, the following list of aver- 
age prices of the grain and buttermilk used is given: 
Table 1. — Average prices of grain and buttermilk used in the feeding experiments. ' 
Year. 
Feed. 
Experi- 
ment A. 
Experi- 
ment B. 
Experi- 
ment C. 
Experi- 
ment D. 
1911 
1912 
1911 
1912 
1911 
1912 
1911 
1912 
1911 
1911 
1912 
1911 
1912 
1911 
1912 
1912 
1912 
1912 
Corn meal, per 100 pounds 
do 
Low-grade wheat flour, per 100 pounds. 
do 
Oat flour, per 100 pounds 
do 
Shorts, per 100 pounds 
do .• 
Linseed meal, per 100 pounds 
Tallow, per 100 pounds 
do 
Buttermilk, per eallon 
do 
Condensed buttermilk, per gallon 
do 
Graham flour, per 100 pounds 
Bone, per 100 pounds 
Meat, per 100 pounds 
SI. 38 
1.48 
1.42 
1.50 
1.25 
1.20 
.06 
"2.66 
SI. 32 
1.39 
1.30 
1.3S 
2.25 
1.50 
1.30 
1.18 
7.00 
8.00 
.02 
.02 
SI. 45 
1.69 
1.35 
1.45 
1.28 
1.27 
2.50 
2.50 
SI. 35 
1.74 
1.30 
1.52 
1.30 
1.20 
2.50 
.08 
1.50 
3.25 
EXPERIMENT A, 1911. 
Most of the lots in this experiment at Station 3 were fed for a 
short time only during the first part of the feeding season, due to the 
lack of suitable equipment and space for fattening. The station was 
overcrowded twice during the season, which lowered the gains and 
increased the cost in both instances. The low, tin roof made the 
building too hot during warm weather, and produced a thick con- 
densation of moisture on the inside of the roof in cool weather, when 
the building was partially closed. The gains, except for these two 
crowded periods, were fairly consistent throughout the season and 
