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|Pasteur: A Study in Greatness
|5
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|Concealing Coloration
|20
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|Expansion of the Usefulness of Natural History Museums
|36
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|The History and Varieties of Human Speech
|45
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|University Standards and Student Activities
|68
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|The Psychology of Mental Deficiency
|82
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|Jacobus Henricus Van't Hoff
|95
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|The Progress of Science
|98
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|The Significance of Tropisms for Psychology
|105
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|Feeling in the Interpretation of Nature
|126
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|The Typhoid Fly on the Minnesota Iron Range
|137
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|What Makes a College? |151 |- |The University in Politics |160 |- |The Classification of the Sciences |165 |- |Francis Galton |171 |- |The Origin of Luminous Meteor Trains |191 |- |The Progress of Science |205 |- |colspan=2| |- |The Bureau of Standards |209 |- |On the History of Internal Medicine |220 |- |Science and Social Progress |236 |- |Attempts to Explain Gravitation |252 |- |The Purpose and Some Principles of Systematic Zoology |261 |- |The Narrowing Circle of the Animal Kingdom |272 |- |Food Preparation and its Relation to the Development of Efficient Personality in the Home |277 |- |The Constitutional Conservatism of Women |299 |- |Floating Islands |303 |- |The Progress of Science |309 |- |colspan=2| |- |Genetics |313 |- |Civilization and Vegetation |328 |- |English as an International Language |337 |- |Perfect Flowers in Maize |346 |- |The Sounds of ch and j |350 |- |The Relative Importance of Mental Pain |355 |- |Language Study and Language Psychology |369 |- |Agriculture in the High School |385 |- |The Laws of Environmental Influence |396 |- |The Race Fiber of the Chinese |403 |- |The Progress of Science |409 |- |colspan=2| |- |The Bering River Coal Field, Alaska |417 |- |Insect Parasitism and its Peculiarities |431 |- |Mathematics and Engineering in Nature |450 |- |American Mathematics |459 |- |Buffon and the Problem of Species I |464 |- |A World-Wide Color Line |474 |- |The Crossing of the Races |486 |- |The Conservation of the Food Supply |496 |- |The Moral Influence of a University Pension System |502 |- |The Progress of Science |514 |- |colspan=2| |- |Science Among the Chinese I |521 |- |Why Do Certain Living Forms Produce Light? |532 |- |The Water Relations of Desert Plants |540 |- |Buffon and the Problem of Species II |554 |- |Protozoan Germ Plasm |568 |- |Adamas: Or the Symmetries of Isometric Crystals |581 |- |The Lack of Printing in Antiquity |584 |- |Is Vegetarianism Capable of World-Wide Application? |587 |- |A Bugbear of Economics |594 |- |The Germans at School |602 |- |The Progress of Science |615 |- |Index |621 |- |}Popular Science Monthly Volume 79