Abstract
THE distribution of embryo mortality in turkey eggs is not reported in the literature. In the experiment reported herein it has been determined and compared with that of the fowl. Payne (1919) found that there were two critical periods during the incubation of chicken eggs. These periods of high mortality occurred on the fourth, fifth, and sixth days and on the eighteenth, nineteenth, and twentieth days of incubation. He observed also that the critical periods coincided in natural and artificial incubation.Byerly (1930) noted the occurrence of a minor peak of mortality in chicken eggs on the seventh day of incubation, and Byerly, Titus, and Ellis (1933) found a mid-incubation peak related to nutritional deficiencies in the diet of the breeding flock. Riddle (1930) found that embryo mortality of the common pigeon, ring dove, and wild dove, when plotted on a comparable basis with that of chickens (Payne’s data) showed .
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