28 
BULLETIN 561, U. S. DEPARTMENT OF AGRICULTURE. 
the feed cost and value of eggs per dozen in Pen 8 over a period of 
two years. The feed cost during the first year is fairly constant, but 
becomes more variable after this period. Figure 4 shows annual com- 
parisons of the Leghorns and general-purpose breeds, also the effect 
of certain feeds. 
A^GSVOsPA/iS' 
0077-0/V v52fZ2? AZ&7A. 
A/O &£}£:*■ <SCs&7y& 
A/0 &£&■ <SC/&4s?- . 
Fig. 4.— Average feed cost of egg production. 
Table 7. — Feed cost per dozen eggs for 4-week periods, 1912-13. 
Period. 
First laying year. 
Penl. 
Pen 2. 
Pen 3. 
Pen 4. 
Pen 5. 
Pen 6. 
1912. 
Cents. 
11.3 
14.7 
29.5 
11.6 
9.2 
7.8 
6.5 
6.2 
6.6 
7.7 
7.5 
14.1 
19.8 
(102.0) 
(70.0) 
(55.0) 
Cents. 
13.5 
10.5 
11.7 
6.6 
7.5 
6.0 
5.4 
5.1 
5.6 
7.9 
7.4 
8.1 
13.1 
(22.9) 
(44.4) 
(51.3) 
Cents. 
28.2 
10.7 
11.5 
11.3 
8.5 
7.4 
7.6 
7.6 
8.5 
11.1 
14.7 
15.3 
31.5 
(35.0; 
(38.1) 
(45.4) 
Cents. 
Cents. 
Cents. 
1913. 
7.9 
6.1 
4.4 
4.1 
4.5 
5.0 
7.1 
7.4 
9.9 
18.1 
41.0 
41.1 
26.3 
13.7 
10.4 
8.1 
7.4 
8.9 
6.5 
9.2 
10.5 
13.3 
15.2 
26.7 
29.9 
19.1 
18.8 
12.0 
S.l 
7.7 
May 
8.9 
8.1 
July 
August 
September 
October 
11.8 
12.5 
19.7 
2S.1 
28.7 
December 
1914. 
23.8 
31.9 
9.9 
7.7 
10.9 
7.3 
11.2 
13.2 
I 
Figures in parentheses are repetitions, put in for comparison; they are not included in the averages 
For repetition of month of May see note under Table 4. 
