Abstract
Broiler hatching eggs were stored under air pressure at 1,056 g./cm2 (15 p.s.i.) for varying time periods prior to incubation. Eggs 8–13 days old when incubated and which had been under continuous treatment or for only the last two days, had 8 and 4% higher hatchability, respectively, than the eggs held in the control storage room. After 20.25 days incubation, 40% of the total chicks had hatched from the pressurized egg and 30% from the control eggs.None of the pressure treatments had a significant effect on eggs 2–7 or 14–19 days old when incubated.Although the pressure chamber was within the storage room there was a difference in both temperature and humidity.
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