The Evolution of Man a Series of Lectures Delivered Before the Yale Chapter of
The Evolution of Man a Series of Lectures Delivered Before the Yale Chapter of
George Alfred Baitsell
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A study of the growth curves for height and weight (Fig. 25), which have been plotted by averaging the results obtained from weighing and measuring many children at various ages, but mostly over five years of age, shows a general agreement of results. There is a loss of weight for the first few days 68 THE EVOLUTION OF MAN after birth, the postnatal retardation. During the first year, growth in both weight and height is rapid the boy increasing AGE o 5 10 YEARS eo 25 70 60 50 30 Females 140 120... 100 80 60 Fig. 25. Growth curves for increase in weight and stature for both sexes. From Donaldson, after Roberts. THE NATURAL HISTORY OF MAN 69 more rapidly than the girl then the rate of growth goes on more slowly up to seven years of age. This is followed by a more rapid increase in growth rate up to about seventeen years in the boy and sixteen years in the girl, with a prepubertal acceleration present in both sexes. The growth rate then de- creases to twenty-five years of age, at which time growth prac- tically ceases.
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