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|The Career of Herbert Spencer
|5
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|Lineaments of the Desert
|19
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|On the Therapeutic Action of Fermented Milk
|31
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|Poetry and Science: The Case of Charles Darwin
|43
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|A Biographical History of Botany at St Louis, Missouri II
|48
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|The Art of Bleaching and Dyeing as Applied to Food
|58
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|Mr Roosevelt's Opportunity as President of a University
|62
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|Commercialism
|70
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|Foreign Associates of National Societies II
|80
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|The School and the Family
|84
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|The Progress of Science
|96
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|colspan=2|
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|The National Exposition at Rio de Janeiro
|105
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|A Biographical History of Botany at St Louis, Missouri III
|124
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|The Latest Calabrian Disaster
|134
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|Jefferson Davis's Camel Experiment
|141
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|Railroads and the Smoke Nuisance
|153
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|Account of a Trip in Southernmost Japan, with Early Records of its Discovery
|161
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|An American Contribution to the History of the Physiology of Digestion
|174
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|The Instruments and Methods of Research
|184
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|The Progress of Science
|203
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|colspan=2|
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|The Electric Operation of Steam Railways
|209
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|The Influence of Radium Rays on a Few Life Processes of Plants
|222
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|The Work of Boards of Health
|233
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|A Biographical History of Botany at St Louis, Missouri IV
|240
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|Fire's Havoc a Senseless Waste
|259
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|The World's Annual Metal Crop
|271
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|Science and Morality
|284
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|Steps in the Evolution of Religion
|290
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|The American Public School
|300
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|The Progress of Science
|308
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|colspan=2|
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|Life and Works of Darwin
|315
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|The Individuality of Charles Darwin
|344
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|Darwin and Geology
|349
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|Darwin and Botany
|355
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|Darwin and Zoology
|361
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|For Darwin
|367
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|Predarwinian and Postdarwinian Biology
|381
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|The Halo of a Hundred Years: February, 1809 to February, 1909
|386
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|The Origin of the Theory of Natural Selection
|396
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|The First Presentation of the Theory of Natural Selection
|402
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|The Progress of Science
|407
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|colspan=2|
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|The Type of the Panama Canal
|417
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|Tariff Revision from the Manufacturer's Standpoint I
|442
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|Tariff Revision from the Manufacturer's Standpoint II
|450
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|Tariff Revision from the Importer's Standpoint
|457
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|Tariff Revision from the Consumer's Standpoint
|463
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|A Permanent Tariff Bureau: Its Relation to Congress and Proper Procedure for Tariff Revision |468 |- |Josiah Willard Gibbs and his Relation to Modern Science I |470 |- |On a Very Prevalent Abuse of Abstraction |485 |- |The Closing of a Famous Astronomical Problem |494 |- |The Harpswell Laboratory |505 |- |The Progress of Science |514 |- |colspan=2| |- |The Tides: Their Causes and Representation |521 |- |Facts Concerning the Determination and Inheritance of Sex |540 |- |Josiah Willard Gibbs and his Relation to Modern Science II |551 |- |Suggestions from Two Cases of Cerebral Surgery Without Anesthetics |562 |- |Hysteria as an Asset |568 |- |Notes on Certain Philosophies of the Day |575 |- |Formative Influences |579 |- |Training College Teachers |588 |- |Okefinokee Swamp |596 |- |The Progress of Science |615 |- |Index |621 |- |}Popular Science Monthly Volume 74