Trans plaiitation of Ovaries in Chickens 



565 



The eggs' and chicks averaged less in weight from the operated 

 hens than from the controls. 



The operated hens at the beginning of the laying season were 

 somewhat lighter than the controls.^ In other respects no dif- 

 ferences were observed either in the hens, eggs or chicks. 



The eggs became fertile in two to four days after mating. On 

 cessation of mating the eggs became infertile in eleven to nine- 

 teen days, the majority becoming so on the fifteenth day.^ 



Control hens {B ^ and JV^), mated to the rooster of the same 

 breed gave uniformly black fetuses and chicks in the case of the 

 black hen, and white fetuses and chicks in the case of the white 

 hen. 



The normal black chicks had grayish-yellow breasts and 

 throats and frequently the under surface of the tips of the wings 

 were light colored as well, but the plumage on the entire dorsal 

 surface was ahuays solid black. The light colored areas on the 



Note — The eggs in this table were laid early in March. 



8 February 14, 1907, the weights of the chickens were as follows: grams. 



Black hen no. i (JBi) 1500 



Black hen no. 2 {B2) 1250 



Black hen no. 3 (£3) 1250 



Black rooster (BR') 1 650 



White hen no. i (jFi) 1480 



White hen no. 2 {Wz) 1450 



White hen no. 3 (^3) 111. Not less than 1250 



White rooster QVR) 1 990 



' This agrees with results on tnis point published by the Ohio University and Experiment Station. 



