subjects of study. John Wesley Powell, (born March 24, 1834, Mount Morris, New York, U.S.âdied September 23, 1902, Haven, Maine), American explorer, geologist, and ethnologist, best known for his exploration of the upper portion of the Colorado River and the Grand Canyon. Early life and initial explorations. 1  Powell was the fourth child of English immigrants Joseph Powell, a tailor, farmer, and itinerant Methodist preacher, and Mary Dean, a missionary.
If on the other hand you use an incubator in order to hatch fertilized chicken eggs, they can sometimes hatch a day or two early, or they can also hatch out a few days late. Things like humidity and temperature play a significant role.
Iâm not sure if you are talking about âif none hatchâ or âafter some have hatchedâ. In theory chicken eggs should hatch after 21 days of incubation but thatâs just theory. Many things affect when eggs hatch, heredity, humidity, how and how long the eggs were stored, and just plain differences in individual eggs.A big factor is average incubation temperature.ine are never late but others have reported eggs in an incubator and under a broody a few days late. That 21 days is just a theory. Reality is often different. Iâve had hatches that were totally over in less than 18 hours from the first to the last.