118 Cc. B. DAVENPORT 
Polish—Houdan hybrid) was mated with a Black Minorca 
14122 4. The results of this mating are given in table 4. 
Experiment 5. No. 11693 ¢, used in this experiment, is a white 
bird that had ‘smoke’ on down when hatched. It is of somewhat 
complex origin. Its mother was an F, hybrid between a Black 
Spanish cock and a White Leghorn; its father had the same ele- 
ments and also white Silkie in its ancestry. No. 11693 has, con- 
sequently, black recessive. It has a single comb, is free of the 
skin pigment of the Silkie, is clean-shanked and has four toes on 
the right foot and five on the left. 
On September 19, 1909, this pullet (which was hatched March, 
1910) was treated with atropin, etherized during half an hour and 
opened as usual between the last two ribs. All of the ovary, as 
far as could be seen, was removed. Pieces of ovary from no. 
11280 ¢ (a straight-bred Dark Brahma bantam) were placed in 
contact with the peritoneum, near the removed ovary, but not 
stitched in, as the bird showed signs of succumbing. The cut 
was sewed up and the bird set aside where it lay quiet for half an 
hour.2. The Dark Brahma from which the ovary (whose eggs 
measured 0.5 mm. in diameter) was removed died in consequences 
of hemorrhage. 
Later No. 11693 was mated with 11291 7 (in mating 1027: 
11693). He is a straight-bred dark Brahma bantam cock, used 
also in experiments 1 and 3. The results are shown in table 5. 
Experiment 6. No. 11826¢, hatched March, 1909, a pure bred 
Dark Brahma was opened October 2, 1909, and ovary imperfectly 
removed. Ovary of no. 12550 (a White Leghorn-Minorca-Polish- 
Houdan hybrid) sewed on to peritoneum at point of removal. 
The ovary had been kept out of body of hen about ten minutes, 
but covered and moist. 
In the late winter of 1910 no. 11826 ¢ was mated in pen 1050 
with 14122 4, a single-comb Black Minorca. The results are 
given in table 6. 
* See postscript. 
