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12. Portrait of a middle-aged man in regards to man's development. Artist is Carl Bohnen, 1871-1951.
13. Portrait of a young man in regards to man's development. Artist is Carl Bohnen, 1871-1951.
14. Portrait of an older man in regards to man's development. Artist is Carl Bohnen, 1871-1951.
15. Chart comparing output, intelligence, and boredom of factory workers with inferior intelligence who perform soap wrapping and chocolate packing.
16. Chart depicting scores of department store saleswomen in Minneapolis and St. Paul regarding personality and ability.
17. Bar graph listing primary causes of accident proneness (Cleveland Railway Company)
18. Ergogram measuring physical fatigue after repeated motion.
19. Effect of noise vs. quiet on the ability to work. The woman typist is wearing a mask under quiet and noisy conditions ; her breath is monitored by a man who is taking notes.
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