Popular Science Monthly/Volume 61

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|The Electronic Theory of Electricity

|5

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|Sulfuric Acid and its Manufacture by the Contact-Process

|24

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|The Physical Basis of Heredity

|32

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|Children's Vocabularies

|45

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|Mescal: a Study of a Divine Plant

|52

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|Infectious Diseases

|72

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|The Physiological Effects of Electrically Charged Molecules

|76

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|An Afternoon at Chelles and the Earliest Evidences of Human Industry in France

|81

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|The Progress of Science

|89

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|On the Definition of Some Modern Sciences

|99

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|The Commercial Value of Human Life

|120

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|Instinct

|126

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|Educational Value of Photomicrography

|143

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|Sugar and the Sugar Beet

|157

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|Peter Guthrie Tait

|163

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|Concerning the American University

|170

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|Scientific Literature

|183

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|The Progress of Science

|184

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|Studies in the Natural History of the Sacramento Salmon

|195

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|A Modern Street

|212

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|Views of Dr Rizal, The Filipino Scholar, Upon Race Differences

|222

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|Gold Mining in Klondike

|230

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|A Study of Twentieth Century Success

|241

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|The Panama Route for a Ship Canal I

|252

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|Princeton in the Nation's Service

|269

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|The Antillean Volcanoes

|272

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|Scientific Literature

|282

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|The Progress of Science

|283

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|The Problem of Consciousness in its Biological Aspects

|289

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|The Panama Route for a Ship Canal II

|304

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|Social Bacteria and Economic Microbes

|317

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|Marriage Among Eminent Men

|328

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|University-Building

|330

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|Some Observations on the Behavior of the Social Wasps

|339

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|Field Notes of a Geologist in Martinique and St. Vincent

|352

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|Mental and Moral Heredity in Royalty I

|369

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|Scientific Literature

|379

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|The Progress of Science

|380

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|Areography

|385

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|University Control

|396

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|The World-View of a Scientist: Ernst Haeckel's Philosophy

|407

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|Eels and the Eel Question

|426

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|The Story of a Word - Mammal

|434

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|A Year of Weather and Trade in the United States

|439

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|Mental and Moral Heredity in Royalty II

|449

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|A New Theory of Light and Colours

|461

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|Discussion and Correspondence

|472

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|The Progress of Science

|473

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|A Study in Plant Adaptation

|483

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|The American Origin of Agriculture

|492

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|Mental and Moral Heredity in Royalty III

|506

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|The Competition of the United States with the United Kingdom

|514

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|Scientific Heading in a Public Library

|524

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|An Ascent of Mt Orizaba

|528

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|Origin of the Fins of Fishes

|536

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|Domestic and Intercollegiate Athletics

|548

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|Recent Advances in Science, and their Bearing on Medicine and Surgery

|558

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|Discussion and Correspondence

|565

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|The Progress of Science

|567

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|Index

|573

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|}Popular Science Monthly Volume 61