Insect development. VII. Early stages in the development of grasshopper eggs of known age and with a known temperature history

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Abstract
The rate of maturation and of development during the first 4 days has been followed in Melanoplus differentialis eggs (from mated females) collected (1) just before they were laid, or (2) immediately after oviposition had been completed and (1) either fixed at once, or (2) after incubation at 25°C. for definite periods.