92 



POULTRY PRODUCTION 



of tlie (i\ary. Wln'ii tlic oxary is ciilii-cly rciiioxcd tlic ]>ull(t 

 |j;r()\\s till' ])liniiam' of a corkoirl (oi- moi-c accurately, <il a 

 caiJOiij with a ty])ical hackle and saddle, and a, lon,t;tail with 

 sickle feathers, lie has also shown that after siicccssfnl 

 ovareetoiiiy the denuu'ely colored Jioueii duck takes on the 

 brilliant colors of the male following the next molt. 



( "ole and Li])pineott' haA'e shown that a hen whose ovary 

 is destroyed by a tumor grows plumage whieli in shape is 



Fi.;. 31 



A Han-LM.I l'l\'iii.,iini Hork lici, Hl.irl, ,|,,^,.|,,,„.,1 sa^.ll,', sickle an.l hackle 

 feathers typical of a male or cajion, as the result of the o\ary beiny destroyed 

 by a tumor. (Aftia- I ole and Lipiiincott.) 



(|uite t>']iieal of a male or capon (see Figures Ml and Ml!). 

 They showed further that b\' introducing into the bod\- 

 ca\ity ])ieces of o\ary from another female, feathers typical 

 of a normal female eoiild later be grown on the same bird. 



(Joodale- went even further and quite coiiipletel> feniinizeil 

 eoekerels so far as appearance is concerned, b\- castrating 

 them and engrafting o\aries. Tlieo\ary also seems to inhibit 



' Hiological Bulletin, \ol. \xx\ i, Xo. 3. 

 ^ Genetics, vol. iii. No. 3. 



