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|Soil Wastage
|5
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|The Mississippi River Problem
|13
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|The High School Course
|28
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|Count Rumford
|32
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|Hypothesis of Radiant Matter
|52
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|The New Philosophy Called Pragmatism
|61
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|The Movement Towards Physiological Psychology II
|73
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|A Physiological Problem: Enzymes
|81
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|Needed: A System of Aquatic Farming
|85
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|The Progress of Science
|93
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|The History of the Conservation of Energy: The Age of the Earth and Sun
|97
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|Florissant; a Miocene Pompeii
|112
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|Crimes of Violence in Chicago and in Greater New York
|127
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|The Movement Towards Physiological Psychology III
|135
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|The Nature, Origin and Function of Humor
|144
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|A Bacteriological Study of Soiled Paper Money
|157
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|Facts Concerning Milk
|166
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|Shall our Forest Wealth Be Destroyed? |176 |- |The Progress of Science |189 |- |colspan=2| |- |The Botanical Gardens of Ceylon |193 |- |The Prehistoric Aborigines of Minnesota and their Migrations |207 |- |The Movement Towards Physiological Psychology IV |226 |- |The Practical Value of Pure Science |234 |- |The Physique of Scholars, Athletes and the Average Student |248 |- |Modern and Early Work Upon the Question of Root Excretions |257 |- |Silver |267 |- |Japanese Writing |277 |- |The Progress of Science |283 |- |colspan=2| |- |Spoliation of the Falls of Niagara |289 |- |The Industries of Niagara Falls |306 |- |The Classification of Mathematics |319 |- |Academic Aspects of Administration |326 |- |The Specialist Blight on American Education |340 |- |Something New in Freewill |345 |- |The Laws of Social Attraction |354 |- |The Passing of the Sturgeon: A Case of the Unparalleled Extermination of a Species |361 |- |Foreign Associates of National Societies I |372 |- |The Progress of Science |380 |- |colspan=2| |- |Deductions from the Records of Running in the Last Olympiad |385 |- |Monte Alban and Mitla as the Tourist Sees Them |392 |- |The Rotation of Crops |403 |- |The Public-School Teacher in a Democracy |413 |- |Celibate Education To-Day |423 |- |The Inadequacy of Speech |429 |- |Zoology |441 |- |Experiments with the Langley Aerodrome |462 |- |The Progress of Science |475 |- |colspan=2| |- |The Cause of Pulsation |481 |- |A Biographical History of Botany at St Louis, Missouri I |488 |- |The Application of Zoological Laws to Man |500 |- |Canadian Wheat |523 |- |College Standardization |528 |- |Aspects of Modern Biology |540 |- |Loyalty |549 |- |The Story of Professor Rontgen's Discovery |554 |- |A Great Permian Delta and its Vertebrate Life, with Restorations by the Author |557 |- |The Progress of Science |569 |- |Index |573 |- |}Popular Science Monthly Volume 73