The Influence of Physiological Age upon Scholarship *Syllabus of a paper delivered before the first congress of the National School Hygiene Association of America, held in Washington, D. C., May 6 and 7, 1907.

ance, pubescence, change of voice, menstruation, menopause, etc. Pubescence is an evidence of sexual ripening and the beginning of adolescence. Pubescence in the male is the feature studied in this work. For the purpose, three physiological groups are distinguished, corresponding to three succesive stages of development: (1) prepubescence, (2) pubescence, (3) postpubescence. The percentage of prepubescent, pubescent and postpubescent population in each age group, taken in half years, is given in Table I. This table, which is based on 4,800 records, shows that each chronological age group contains subgroups based upon physiological age.