510 
Bulletin No, 162.—1915. 
24. A pair of Mourning Doves continued to sit on substituted eggs 
for four days after their own had hatched in an incubator, thus 
disproving Raspial’s assertion that wild birds have an “exact notion 
of the time required for the eggs to hatch” (p. 506). 
List of References* 
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1910. Historia animalium. The works of Aristotle. Vol. 4. 
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Burns, F. L. 
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Bulletin, No. 31, N. S., Vol. 7, No. 2, 82 pp. Oberlin, 
Ohio. 
Cole, L. J. 
1911. Sex ratio and other reproduction statistics in Tumbler 
pigeons. [Preliminary note.] Science, Vol. 33, No. 
842, p. 270. 
1913. Sex-limited inheritance. Amer. Breeders' Mag., Vol. 4, 
No. 3, pp. 154-161. 
1914. Studies on inheritance in pigeons: I. Hereditary re¬ 
lations of the principal colors. R. I. Agr. Expt. 
Sta. Bui. 158, pp. 311-380, pis. 1-4. 
Cu£not, L. 
1899. Sur la determination du sexe chez les animaux. Bui. 
Sci. France et Belg., Vol. 32 (5th ser., Vol. 1), pp. 462- 
535. 
1900. La distribution des sexes dans les pontes des pigeons. 
Compt. Rend. Soc. Biol. [Paris], Vol. 52, pp. 870-872. 
Darwin, Charles. 
1875. The descent of man, and selection in relation to sex. 
Newed., New York, Appletons, 688 pp. 
