THE BREEDING OF CHICKENS 



121 



While Felcli's sj'stem is commonly spoken of as line breed- 

 ing, it is only with reference to the individuals shown in the 

 outside lines of l-'igure 53 that true line breeding takes jjlaee. 



FiQ. 53 



CNPRATIOMS 



C »• 



Breeding chart, after Felch and Pierce. (Courtesy of Breeders' 

 Gazette, Chicago.) 



The mating of the two extreme lines to produce the groups 

 at I and M averaging half the blood of the sire A and half 

 the blood of the dam B simply represents other methods of 

 getting the results of the first cross, or of a brotlier and sister 



