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|The Smallest of the Century Plants
|5
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|Euthenics and Eugenics
|16
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|The Meteorology of the Future
|21
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|Kant and Evolution II
|36
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|University Reforms
|52
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|Is the Diminishing Birth Rate Volitional? |71 |- |Race Suicide vs Overpopulation |81 |- |The Health Instinct |84 |- |War and Manhood |88 |- |The Progress of Science |100 |- |colspan=2| |- |The Disciplinary Value of Geography I |105 |- |Professor Brooks's Philosophy |120 |- |Alpheus Hyatt, 1838-1902 |129 |- |Ibsen, Emerson and Nietzsche: The Individualists |147 |- |Physiognomy and Genius |158 |- |Geographic Influences in the Evolution of Nations |164 |- |The Dynamics of a Golf Ball |184 |- |The Progress of Science |199 |- |colspan=2| |- |Ehrlich's Specific Therapeutics in Relation to Scientific Method |209 |- |The Disciplinary Value of Geography II |223 |- |The Work of the Albatross in the Philippines |241 |- |The Story of a King and Queen |251 |- |The Social Problem |258 |- |Motor Education for the Child |268 |- |The Case of the College Professor |273 |- |The Consulting Psychologist |283 |- |The Work of the Chemist in Conservation |291 |- |The Progress of Science |305 |- |colspan=2| |- |The Genesis of the Law of Gravity |313 |- |Edward Palmer |341 |- |Freud's Theories of the Unconscious |355 |- |Impressions of Military Life in France |364 |- |Reality and Truth |371 |- |The Cost of Living |377 |- |Alcohol - Its Use and Abuse |381 |- |Scientific versus Personal Distribution of College Credits |388 |- |The Progress of Science |409 |- |colspan=2| |- |The Formation of North American Natural Bridges |417 |- |Some Weather Proverbs and their Justification |428 |- |Science at the Medieval Universities |445 |- |The Search for the Soul in Contemporary Thought |460 |- |Progress in Control of Plant Diseases |469 |- |The Services and Rewards of the Old Greek Volunteer |477 |- |Language and Logic |491 |- |The Languages of the American Indians |500 |- |The Progress of Science |516 |- |colspan=2| |- |The Measurement of Natural Selection |521 |- |The Relation of Biology to Agriculture |539 |- |Is Euclid's Geometry Merely a Theory? |554 |- |The Underlying Facts of Science |564 |- |The Vienna Institution for Experimental Biology |584 |- |The Relation of the Manual Arts to Health |602 |- |What Masterpieces of Greek Sculpture Were Known to the Men of the Renaissance? |610 |- |The Progress of Science |615 |- |Index |621 |- |}Popular Science Monthly Volume 78