Fig. 36—Necrotic Tips of Fetal Sacs, Swine, /, /a, Necrotic embrj^os in totally necrosed fetal sacs ; 2, 2, normal embryos within amnion, the allantois having been opened ; 4, necrotic
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Diseases of poultry; their etiology, diagnosis, treatment, and prevention. Poultry. 148 Diseases of Poultri/ posterior ciul of its lung where it opens into the abdominal air sac. This relation is shown
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