Transplantation of Ovaries in Chickens 57 1 



and other fowls and on a number of different species of mam- 

 mals are now being conducted. Other transmitable characters, as 

 size, peculiarities of anatomical structure, etc., are being observed. 

 Also experiments on the transplantation of the testicles are being 

 made. 



It will be of interest to determine if the adult ovaries, or if 

 more embryonic ovaries will give concordant results when trans- 

 planted. 



It seems that the qualities of the ovaries transplanted in these 

 experiments may have been modified by the foster mother. Or the 

 foster mother influence may have only been impressed after fertili- 

 zation of the egg; or the influence may have been effective both 

 before and after the egg was discharged from the ovary. A dis- 

 cussion of possible ways in which such influence might act would 

 be unprofitable at this time. At present we are justified only in 

 saying that a field appears to be open to attack with a reasonable 

 hope of profit. 



CONCLUSIONS 



1 The ovaries transplanted in these chickens seemed to func- 

 tion in a normal manner. 



2 The color characters of the resulting offspring appeared to 

 be influenced by the foster mother. 



