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



EXPLANATION OF PLATE I. 



FIG. i. Barred Plymouth Rock pullet "Kansas 1050" after assumption of 

 male plumage. 



FIG. 2. Normal Barred Plymouth Rock pullet (Kansas Station No. 890), a 

 flock sister of "Kansas 1050," and of approximately the same age. 



FIG. 3. Normal Barred Plymouth Rock cockerel (Kansas Station No. 2iM), a 

 full blood brother of pullet 890. 



FIG. 4. Plumage on back of neck of "Kansas 1050," photographed on July 28, 

 1917, nearly four months after implantation of ovarian tissue. The difference 

 between the old "cock" feathers on the right side and the new "hen" feathers on 

 the left side is plainly distinguishable. 



FIG. 5. Dorsal view of "Kansas 1050," taken on July 28, 1917, showing the old 

 and new plumage, particularly on the lower back. 



FIG. 6. Ovarian tumor from "Kansas 1050." 



