Abstract
SEXUAL maturity in pullets has been studied rather extensively by a number of investigators because of its relation to egg production. Some of the workers who have reported on this characteristic are: Rice (1915), Kennard (1921), Hurst (1921), Goodale (1922), Hays and Bennett (1923), Dunn (1923), Jull (1924), Kempster (1925), Lippincott et al (1925), Parkhurst (1926), Knox (1930), and others. The data of these investigators indicate in general that age at sexual maturity is highly variable in a flock. In the Rhode Island Red flock of 820 pullets hatched in 1923 at the Massachusetts Station, the coefficient of variation for age at first egg was 13.31 percent.Body weight at sexual maturity should be a useful crude measure of growth if the effect of variability in age could be removed. Card and Kirkpatrick (1918) report the mean weight at weekly intervals on 250 Rhode Island Red pullets. Their data show .
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