AGRICULTURAL EXPERIMENT STATION OF THE 

 RHODE ISLAND STATE COLLEGE. 



BULLETIN 165^ 



STUDIES ON INHERITANCE IN POULTRY: I. 



THE CONSTITUTION OF THE WHITE 



LEGHORN BREED.t 



PHILIP B. HADLEY, 



With the assistance of Dorothy W. Caldwell and C. H. Magoon. 



CONTEXTS. 



I. Introduction p. 153. 



II. Historical Resume p. 156. 



III. Experimental Results p. 163. 



IV. General Discussion of Results p. 182. 



a. Discussion of special cases p. 186. 



1. The Fi matings p. 186. 



2. The F2 matings p. 190. 



3. Other matings p. 194. 



b. Discussion of additional crosses bearing on: 



1. Constitution of the White Leghorn breed with respect to 



factor / p. 205. 



2. Black pigmentation latent in the White Leghorn p. 205. 



♦This bulletin constitutes a part of the Twenty-sixth Annual Report for the year ending June 30 , 

 1913. 



tContributioD No. 19, from the Division of Animal Breeding and Pathology of the 

 Agricultural Experiment Station. 



