Experiment Station Record, Volume 92, January-June, 1945 Page: 40
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40 EXPERIMENT STATION RECORD [Vol. 92
and castration cell formation. The conclusion was fairly well established that
castrate pituitaries contain a larger quantity of gonadotropic hormone than pituitaries
Endocrinological aspects of avidin formation in the avian oviduct, R. HERTZ,
R. M. FRAPS, and W. H. SEBRELL. (U. S. D. A. et al.). (Science, 100 (1944),
No. 2585, pp. 36-37).-The avidin titer of the oviducts of 42-day-old chicks was
materially increased by the administration of stilbestrol and progesterone simultaneously.
The avidin titer increased with increasing progesterone over at least a
sixteenfold range whether stilbestrol was administered simultaneously or not. Similar
reciprocal quantitative relations were observed for desoxycorticosterone as for
progesterone. Thus there was no evidence of the decisive antogonism between
estrogen and progesterone observed in the progestational response of the mammalian
uterus. 'These results are thought to lend additional support to the possibility that
avidin may play a role in the physiology of reproduction.
A comparison of the performance of four varieties of turkeys during the
breeding season, D. WHITSON, S. J. MARSDEN, and H. W. TITUS. (U. S. D. A.).
(Poultry Sci., 23 (1944), No. 4, pp. 314-320).-In groups of 19 to 21 turkey hens
of each breed, with a tom, the average egg production to June 1 in 2 yr. for the
standard-bred Bronze variety was 76, the White Holland 63, the Broad Breasted
Bronze 59, and for the Beltsville Small White 62 eggs. The Broad Breasted Bronze
and Beltsville Small White were significantly later in maturing each year than the
standard-bred Bronze or the White Holland varieties. All birds lost weight between
January 15 and June 1, males losing about 16 percent and females about 10
percent. The Broad Breasted Bronze had a significantly lower hatchability of
fertile eggs set, averaging about 50 percent in the 2 yr., as compared with about
75 percent in the other three breeds.
External morphology of the turkey during the incubation period, R. E.
PHILLIPS and C. S. WILLIAMS. (Md. Expt. Sta.). (Poultry Sci., 23 (1944),
No. 4, pp. 270-277, illus. 7).-Daily changes in the structural development of Black
and Beltsville Small White turkey embryos served as the basis for determining
the age of the embryos. Eggs were stored at 52 F., incubated at 99.75, and the
embryos examined at 12-hr. intervals from 24 to 168 hr. and at 24-hr. intervals
thereafter. Whole mounts were made of embryos up to 7 days. The Beltsville
Small White turkey embryos developed slightly faster than those of the Black
variety, and the embryonic development of the freshest eggs was slightly more
advanced than in the Black birds. The somite counts increased from 7 pairs at
2 days to 47 pairs at 5I days. Fusion of the mandibular arches occurred at 7
days. Formation of the upper jaw was complete at 9 days. Wings were fully
formed at 10 days. Small feather papillae are on the back, tail, and thighs at 11
days. Closure of the eyes proceeds from the twelfth to the sixteenth days. Elongated
plumage occurs on the back, thigh, and tail regions and later over all the
body from the fourteenth to the seventeenth days. The poult fills the entire eggshell
and the yolk sac is completely inside the body at 26 days.
Deposition of pigment in the sparrow's bill in response to direct applications
as a specific and quantitative test for androgen, C. A. PFEIFFER, C. W. HOOKER,
and A. KIRSCHBAUM (Endocrtnology, 34 (1944), No. 6, pp. 389-399, illus. 3).Study
of the effect of various androgens applied intramuscularly or cutaneously to
castrated male and normal female sparrows on the darkening of the bill showed
that direct application of as little as 0.063 iLg. of the testosterone daily in alcoholic
solution to the bill of the castrated male English sparrow induced a unilateral deposition
of a narrow band of pigment in the bill. When systematically administered,
the pigment deposition was bilateral and diffuse and required 8 rg. daily for 10
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U.S. Department of Agriculture. Agricultural Research Administration. Office of Experiment Stations. Experiment Station Record, Volume 92, January-June, 1945, book, 1947; Washington D.C.. (digital.library.unt.edu/ark:/67531/metadc5064/m1/53/: accessed July 26, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.