Juvenile

Definition and stakes

Edwin Seward Puller,  Your boy and his training (1916)

“ Juvenile psychology may be divided into child psychology, covering the period from birth to puberty, and adolescent psychology, covering the period from puberty to maturity. Boyhood is the interval between birth and physical maturity, the latter being reached at the age of twenty-four or twenty-five, when the bones, muscles, and organs of the body have attained their complete development. ”
Source: Gutenberg

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