Twenty fourth meeting. 



Carnegie Institution 's Station for Experimental Evolution, Cold 

 Spring Harbor, Long Island, New York. Ju?ie 22, 

 1907. President Flexner in the chair. 



10 1 (244) 



Demonstrations of methods and results of pedigree breeding 

 of plants and animals. 



By CHARLES B. DAVENPORT. 



[From the Carnegie Institution' s Station for Experimental Evolu- 

 tion, Cold Spring Harbor, Long Island, N. K] 



Four series of pedigreed poultry were shown to illustrate certain 

 laws of inheritance. 



Series I. Darwin's case of "reversion" : 



1, Jungle fowl ; 2, black minorca and 3, white silky, female ; 4, 

 their son, black with red markings as in the jungle fowl ; 5, second 

 hybrid generation, including (a), white type and (b), type with 

 jungle fowl coloration. 



Series II. The production of a frizzle-silky race : 



I, Silky, male; 2, frizzle, female; 3, first hybrid generation, 

 frizzled but not silky ; 4, second hybrid generation, both frizzled 

 and silky feathers in the same individual. 



Series III. Particulate inheritance of plumage color : 



1, Game colored Tosa fowl, male ; 2, white cochin, female ; 3, 

 son of 1 and 2, game colored, feathers barred with white ; 4, 

 second hybrid generation : [a), white type ; (&), game type. 



Series IV. Independence in inheritance of the different char- 

 acters : 



1, White leghorn, male ; 2, Houdan, female (mottled, black and 

 white) ; 3, son of 1 and 2, white, small crest, Y comb, low nos- 

 tril, four toes on each foot ; 4, second hybrid generation, white, 

 high nostril, no crest, heavy muff, four toes. 



Demonstration of inheritance of characters in canaries. 



Series I. Pure crest, crossed with crestless. Offspring all 



(i47) 



