6o8 



Bulletin 318 



PART IV 



THE COMBINED TWO YEARS' WORK WITH THE ORIGINAL" 



FLOCKS 



The fourth part of this bulletin is concerned with the combined data 

 of the first and the second year of work with the original pens. The 

 data for either year alone do not give so substantial a basis on which to 

 interpret results. A marked contrast is found existing between results 

 with the same pen for the first and the second year. The combined 

 work of the two years, therefore, eliminates this varying factor and pro- 

 vides a safer foundation on v/hich to base conclusions. Only the more 

 important parts of the work are thus summarized. 



FOOD CONSUMPTION AND EGG PRODUCTION 



It is shown in Table 34 and Fig. 166 that a dozen eggs were produced 

 by the strong pens on 0.45 pound of food less than was required by the 

 weak pens. In one individual comparison only, the Plymouth Rocks, 

 the weak pen produced at a more economical rate. 



TABLE 34. Amount of Food Required and Cost of Food for One Dozen Eggs 



(True average for two years) 



Summer 

 selected 



White 

 Leghorns 



Strong I Weak 



Fall selected 



White 

 Leghorns 



Strong I Weak 



Barred 



Plymouth 



Rocks 



Strong Weak 



True average 



Strong Weak 



Pen 



Pounds of food required to produce i 



dozen eggs 



Cost of food per dozen eggs 



78-78 I 79-79 



76-76 



75-75 



23-23 



8.15 

 Jo. 121 



8.69 

 $0. 129 



8.45 

 $0,126 



9.42 

 $0. 140 



10.64 



$0,157 



10.40 

 Jo. 166 



9.05 

 Jo. 133 



9. so 

 Jo. 14s 



Poonc/s — o 

 5Trong 78-78\ 



Weak 79-7';> 



5frong 76-76 

 l^eak 7S-75^ 

 strong 21 -zi 

 /4/e^fk25-^5 

 Sfron^-TrueAir- 

 l/i/enK-TmAiT.- 

 FiG. 166 



The amount of food required to produce one 

 dozen eggs. Average for two years 



The cost per dozen 

 '^ ^J eggs, computed on the 

 basis of the cost of 

 food only, shows a 

 similar relationship 

 between the strong and 

 weak pens. The aver- 

 age of all experiments 

 shows that the strong 

 fowls produced a dozen 

 eggs at a cost i . 2 cent 

 lower than did the 

 weak ones. 



