IJO L. J. COLE AND W. A. LIPPINCOTT. 



normal even though the ovary was affected, we decided to try 

 the experiment of removing the tumor and of ingrafting an ovary 

 from another individual, in order to see what effect it would have 

 on the secondary sexual characters, and also in the hope that 

 eggs might be produced normally from the engrafted ovary. 



The operation was undertaken on April 8, 1917, an incision 

 being made in the usual place for caponizing. This disclosed 

 an enormous tumor, estimated to be some 10 cm. in diameter, 

 and highly vascular on the surface. It seemed probable that 

 the tumor was of ovarian origin, but on account of its size its 

 point of attachment could not be definitely determined. Its 

 removal was, moreover, deemed impracticable because of the 

 highly developed and ramifying vascularization. Consequently 

 several pieces of ovary from a freshly killed "white" Andalusian 

 pullet were inserted loosely into the body cavity, and the wound 

 closed. This pullet was nearly ready to lay, an ovum having 

 already entered the oviduct; but only pieces of the ovary with 

 very small ova were used for transplantation. 



The patient made an uneventful recovery, except that the 

 ether used as the anaesthetic apparently caused some irritation 

 of the air passages, resulting in a slight "rattling" in the breath- 

 ing, which persisted for some time. General health, however, 

 appeared excellent, and the bird was bright and active. 



On May 3 a white Wyandotte cock was put into the pen with 

 "Kansas 1050" to test their behavior. He showed no antag- 

 onism to "Kansas 1050" but treated her as if she were a female, 

 in spite of her male appearance. She on her part behaved more 

 like a female, showing no fear of the cock and coming at his 

 food call. She did not, however, display any signs of sexual 

 activity. 



On this date new feathers were beginning to come in on the 

 area which had been plucked for the operation, and as they 

 seemed to differ somewhat in character from the old feathers, 

 other areas were denuded in order to make a further test of the 

 matter. For this purpose the hackle, saddle and sickle feathers 

 were plucked from the left side of the body, leaving those on the 

 right side in place. By July 28, when the photographs repro- 

 duced in Figs. 4 and 5 were taken, the feathers on the neck and 



