Age and Achievement

50 histories 75 80 CHRONOLOGICAL 80 85 CHRONOLOGICAL 80 CHRONOLOGICAL AGES achievement age data age groups Age interval Age versus production age-curves American annual incomes artists attained authors average number best books broken line cantatas cent chapter chemistry contributions chemists Children's literature CHRONOLOGICAL AGES FIG composers composite list constructing contributors creative thinkers curves in figure dates deceased Earlier born Encyclopædia Britannica fact fields of endeavor findings five-year interval foregoing German Grand opera hymn tunes important individuals leaders leadership lesser merit line of figure literary literature mathematicians Mathematics mean age median age novels number of contributions obtained occurred oil paintings older age levels output outstanding peak performance philosophical poems poetry political Practical Invention presents data presidents prose Psychology published Recently born recently-born reveals seems served solid line successive age levels superior tallies tion total number treatise U.S. representatives U.S. senators U.S. Supreme Court writing York younger