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|A Naturalist in the Straits of Magellan
|5
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|The Future of the Human Race
|19
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|Middle and Distance Running
|28
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|The Symbolism of Dreams
|42
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|Modern Medievalism
|56
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|The Nature of Disease and of its Cure
|61
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|The Paleontologic Record II: Paleontologic Evidences of Climate
|67
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|The Migration and Shifting of Devonian Faunas
|70
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|Paleontologic Evidences of Adaptive Radiation
|77
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|Instinct and Intelligence in Birds II
|82
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|The Progress of Science
|99
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|The Past and Present Status of the Ether
|105
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|Physiologic Light
|114
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|Instinct and Intelligence in Birds III
|122
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|The Paleontologic Record III: Anatomy and Physiology in Invertebrate Extinct Organisms |142 |- |Contributions to Morphology from Paleontology |145 |- |Relation of Embryology and Vertebrate Paleontology |150 |- |Observations on the Earthquake of May 26, 1909 |154 |- |The Methods and Uses of a Research Museum |163 |- |The Effects of Smoking on College Students |170 |- |The Danger of Unskill |178 |- |Bacteriology and Parasitology in Relation to Avian Diseases |186 |- |The Role of Selection in Plant Breeding |190 |- |The Progress of Science |204 |- |colspan=2| |- |The Zoological Station at Naples |209 |- |A Unique Collection of Arithmetics |226 |- |John Dee and his Fruitful Preface |236 |- |The Making of the Scientific Investigator |242 |- |The Cause of Social Progress and of the Rate of Interest |252 |- |Parasitic Culture |256 |- |Centralized Authority and Democracy in our Higher Institutions |264 |- |The Five-Fold Functions of Government |274 |- |Associate Members of American Societies |286 |- |The Paleontologic Record IV: Ontogeny: A Study of the Value of Young Features in Determining Phylogeny |292 |- |Paleontology and Ontogeny |295 |- |Paleontology and the Recapitulation Theory |298 |- |Vertebrate Paleontology and the Evidences for Recapitulation |304 |- |The Progress of Science |309 |- |colspan=2| |- |Address Before the National Conservation Congress |313 |- |The Paleontologic Record V: The Relation of Paleobotany to Phylogeny |333 |- |Paleontology and Isolation |338 |- |The Role of Hybridization in Plant Breeding |342 |- |The Natural History and Physiology of Hibernation |356 |- |The Home of the Alligator |365 |- |The Owen Bill for the Establishment of a Federal Department of Health, and its Opponents |373 |- |The Distinction Between the Liberal and the Technical in Education |379 |- |The Tariff Board: Its Scope and Limitations |386 |- |A Supreme Court of Science |396 |- |The Moral Equivalent of War |400 |- |The Progress of Science |413 |- |colspan=2| |- |Alexander Agassiz, 1835-1910 |419 |- |Recent Developments in Physical Science |447 |- |Mathematical Definitions in Text-Books and Dictionaries |457 |- |The Much Misunderstood Fur Seals of Bering Sea |465 |- |The Paleontologic Record VI: The Continuity of Development |473 |- |The Continuity of Development |478 |- |Child Study |482 |- |The Relations Between Teachers and their Pupils |489 |- |Professor Norton's Law of Progress |510 |- |The Progress of Science |513 |- |colspan=2| |- |The Ilongot or Ibilao of Luzon |521 |- |Kant and Evolution I |538 |- |Classics and the College Course |554 |- |Learning Foreign Languages |561 |- |Some European Conditions Affecting Emigration |570 |- |Genius and Stature |579 |- |Certain Characteristics of the South Americans of To-Day |582 |- |When Does a Food Become a Luxury? |590 |- |The Paleontologic Record VII: The Birthplace of Man |594 |- |The Relation of Paleontology to the History of Man, with Particular Reference to the American Problem |597 |- |Two Active Volcanoes of the South Seas |603 |- |The Progress of Science |613 |- |Index |621 |- |}Popular Science Monthly Volume 77