THE TRANSPLANTATION OF OVARIES IN CHICKENS 15 
Experiment No. 2. No. 11379, Dark Brahma with engrafted 
ovary from no. 11605 (White Leghorn-Houdan) was mated in 
pen 1050 with 14122°, a single-comb Black Minorca. Table 2 
gives the juvenile characters of 1, the male parent; 2, the Dark 
Brahma, so-called foster-mother; 3, the hen from which the ova- 
ries were transplanted; 4, the expectation of offspring on the 
assumption that the graft succeeded; and 5, that the graft failed 
and the proper ovary was regenerated; also, 6, the observed char- 
acters in the offspring. 
Without exception the characters of the offspring are clearly 
those of the Dark Brahma x Minorca cross and none of the White 
Leghorn or Houdan differential characters enter into their com- 
position. The grafted ovary produced no eggs that developed, 
the extirpated ovary was regenerated. 
Experiments 3 and 4, operations. The protocol of the grafting 
operations is as follows: 
No. 11541 ¢ is a white-plumaged hen derived from a cross 
between 8681 ¢,a WhiteLeghorn-Minorca-Polish bird, and 7811 2, 
a Houdan cross hatched (in pen 905) in February, 1909; fasted 
two days. On October 2, 1909, injected with 0.005 grain atropin 
in 1 ec. of water; etherized and opened. Ovary very large, two 
large pieces (60 per cent) of ovary removed. Strong hemor- 
rhage. Two small pieces of ovary from no. 11383¢, Dark 
Brahma, sewed with peritoneum close to ovarial artery. Sewed 
up. Bird slow in recovery. 
No. 11383 ¢, straight Dark Brahma, hatched February, 1909, 
from mating 907: 7549. On October 2, 1909, injected with atro- 
pin, etherized and opened, ovaries small, incompletely removed. 
Two large pieces of ovary of no. 11541 sewed into peritoneum. 
Sewed up. Bird recovered rapidly. 
RESULTS, experiment 3. No. 11541, White Leghorn-Black 
Minorca-Polish-Houdan hybrid, with engrafted ovary from No. 
11383, Dark Brahma, was mated in pen 1027 with 11291 ~, a pure 
bred Dark Brahma. The results of this mating are given in 
table 3. 
Experiment 4. No. 11383¢, pure-bred Dark Brahma with 
engrafted ovary from no. 11541 (White Leghorn-Black Minorca- 
