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|Methods and Profit of Tree-Planting
|1
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|Professor Goldwin Smith as a Critic
|18
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|Monkeys
|20
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|The Development of the Senses
|34
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|The Stereoscope: Its History I
|37
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|Measurements of Men
|53
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|Liberty of Thought
|60
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|A Reply to Miss Hardaker on the Woman Question
|70
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|The Genesis of the Sword
|79
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|On the Diffusion of Odors
|84
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|Color-Blindness and Color-Perception
|86
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|Stallo's Concepts of Modern Physics
|96
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|The Tree That Bears Quinine
|100
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|Sketch of John Lubbock, Bart., M.P. |104 |- |Entertaining Varieties |112 |- |Correspondence |121 |- |Editor's Table |123 |- |Literary Notices |127 |- |Popular Miscellany |136 |- |Notes |143 |- |colspan=2| |- |Speculative Science |145 |- |The Eye-Like Organs of Fishes |164 |- |The Appointment of College Officers |171 |- |Sir Charles Bell and Physiological Experimentation |178 |- |The Zuni Social, Mythic, and Religious Systems |186 |- |Astronomical Panics |192 |- |The Stereoscope: Its Theory II |197 |- |The Jews in Europe I |205 |- |Chemistry in High-Schools |215 |- |A New Theory of the Sun |223 |- |The Future of Mind |239 |- |About the Molds |244 |- |The Introduction of Domestic Animals |246 |- |Hydrodynamics and Electricity |253 |- |The Cause of Tubercular Disease |257 |- |Sketch of Charles R. Darwin, LL.D. |260 |- |Editor's Table |266 |- |Literary Notices |270 |- |Popular Miscellany |277 |- |Notes |287 |- |colspan=2| |- |Plant-Cells and their Contents |289 |- |The Jews in Europe II |300 |- |Porcelain and the Art of its Production |310 |- |The Physiology of Exercise I |317 |- |A Curious Burmese Tribe |328 |- |Problems of Property |331 |- |The Ethics of Vivisection |344 |- |Borax in America |350 |- |Protoplasm |361 |- |The Mechanics of Intermittent Springs |370 |- |A Premature Discussion |376 |- |The Relation of Music to Mental Progress |378 |- |Dr Gunther on the Study of Fishes |383 |- |The Development of Cities |391 |- |Sketch of Professor S. S. Haldeman |395 |- |Entertaining Varieties |402 |- |Correspondence |406 |- |Editor's Table |406 |- |Literary Notices |410 |- |Popular Miscellany |419 |- |Notes |431 |- |colspan=2| |- |The Physiology of Exercise II |433 |- |National Necessities and National Education |444 |- |Acoustic Architecture |454 |- |Progress of the Germ Theory of Disease |462 |- |A Gigantic Fossil Bird |467 |- |The Book-Men |470 |- |About Elephants |480 |- |The Chemistry of Sugar |500 |- |Transcendental Geometry |507 |- |My Spider |513 |- |Sudden Whitening of the Hair |520 |- |How Plants Resist Decay |524 |- |The Topmost Country of the Earth |527 |- |Sketch of Baron Adolf Eric Nordenskiöld |533 |- |Entertaining Varieties |541 |- |Editor's Table |544 |- |Literary Notices |550 |- |Popular Miscellany |560 |- |Notes |575 |- |colspan=2| |- |Electric and Gas Illumination |577 |- |Longevity |587 |- |Animal Self-Defense |595 |- |Brazilian Diamonds and their Origin |610 |- |The Functions of an American Manual Training-School |621 |- |A Note on Thought-Reading |634 |- |The Physician of the Future |637 |- |Trials by Fire and Fire-Jugglers |645 |- |Electromania |650 |- |Anthropoid Mythology |645 |- |The Poisons of the Manufactory |663 |- |Littre, Dumas, Pasteur, and Taine |667 |- |The Chinese: Their Manners and Customs |679 |- |Sketch of Thomas Say |687 |- |Entertaining Varieties |692 |- |Editor's Table |696 |- |Literary Notices |699 |- |Popular Miscellany |707 |- |Notes |717 |- |colspan=2| |- |Massage: Its Mode of Application and Effects |720 |- |Literature and Science |737 |- |What are Clouds? |751 |- |The Past and Present of the Cuttle-Fishes |753 |- |Mozley on Evolution |767 |- |Explosions and Explosives |773 |- |The Utility of Drunkenness |785 |- |Delusions of Doubt |788 |- |The Progress of American Mineralogy |795 |- |Industrial Education in Public Schools |809 |- |Physiognomic Curiosities I |817 |- |The Formation of Saline Mineral Waters |826 |- |A Partnership of Animal and Plant Life |835 |- |Professor Rudolf Virchow |836 |- |Editor's Table |843 |- |Literary Notices |847 |- |Popular Miscellany |855 |- |Notes |863 |- |Index |865 |- |}Popular Science Monthly Volume 21