File:Adolescence - its psychology and its relations to physiology, anthropology, sociology, sex, crime, religion and education (1904) (14576946870).jpg

Identifier: adolescenceitsps001hall (find matches)
Title: Adolescence : its psychology and its relations to physiology, anthropology, sociology, sex, crime, religion and education
Year: 1904 (1900s)
Authors: Hall, G. Stanley (Granville Stanley), 1844-1924
Subjects: Adolescent Psychology Adolescent psychology
Publisher: New York : D. Appleton and Company
Contributing Library: Francis A. Countway Library of Medicine
Digitizing Sponsor: Open Knowledge Commons and Harvard Medical School

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by straight lines but by curves whichdiffer greatly one from the other in the same person and alsodiffer in different individuals in whom the summative meas-ures of gross height and weight may coincide. The brain,e. g., almost ceases to increase in size or weight before pu-berty, when reproductive organs, hips, and muscles then growat an augmented rate. The age of most rapid growth in any ^ See his Manual for Physical Measurements, with anthropometric tables foreach height of each age and sex from five to twenty years, and vitality coefificients.1902. The best manual of its kind. ^ Recherches Anthropom^triques sur la croissance des diverses parties du corps.Paris, 1903, pp. 242. 54 THE PSYCHOLOGY OF ADOLESCENCE part is called its nascent period. While pubertal growthreaches more or less simultaneously nearly every part of thebody, even its energies focus upon certain organs more than Millimeters160120 80 40 0 180 40 0 160120 80 40 0 20016012080 40 0 200160120 8040 0 200 160120 80 4D 0
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13/2 W/z Others, and not a few sequences, to be later noted, are estab-lished, and more detailed and accurate measurements willprobably add to this number. To determine these periods, PARTS AND ORGANS DURING ADOLESCENCE 55 not only for different parts, but for different traits and powersof the soul, is one of the chief quests of genetic study, andwhere established, the result is fraught with most importantpractical results. Third: Not only do different parts reach their maximalsize at different ages, but some continue to grow well on intoold age. A recent writer concludes that the kidneys are attheir largest in the third decade, the muscles, skeleton, intes-tines, and liver in the fifth, the heart and lungs in the eighth;and from this it would seem almost as if each organ has itsyouth, maturity, and old age, and that these do not coincideeither with each other or with the stages of body growth as awhole. The motor organs as the heaviest give to growth itschief character, so that what

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