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Abstract
1. The effects of removal of sub‐embryonic fluid and albumen on the development of the fowl embryo were investigated.
2. A deficiency of sub‐embryonic fluid on day 7 of incubation resulted in a reduction in the volume of the yolk sac and of allantoic fluid, and a reduction in the mass of the embryo later in incubation.
3. A deficiency of albumen on day 3 of incubation led to a reduction in allantoic fluid and embryo mass after day 12 of incubation.
4. The results suggest that the physiology of embryos in unturned eggs is better modelled by eggs deprived of albumen than by eggs deprived of sub‐embryonic fluid.
