# Popular Science Monthly/Volume 81/Index

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I N D E X. :
| NAMES OF CONTRIBUTORS ARE PRINTED IN SMALL CAPITALS. ||
| Abilities, The Permanence of Interests and their Relation to, Edward L. Thorndike | 449 |
| Administrative Peril in Education, Joseph Jastrow | 495 |
| Agricultural Products of the United States | 519 |
| Air, Holes in the, W. J. Humphreys | 50 |
| Allegheny Observatory, The New | 409 |
| American, Descendants of Gauss, Florian Cajori | 105 |
| "Natural History, George Marcgrave, the First Student of, E. W. Gudger | 250 |
| "College, Function of, A. K. Rogers | 574 |
| Anaphylaxis, Some Aspects of, John Auer | 434 |
| Andrews, C. C., Practical Forestry explained | 531 |
| Anniversary of the Royal Society, The Two-hundred and Fiftieth | 308 |
| Arbuthnot, C. C., An Economic Interpretation of Present Politics | 183 |
| Asphalts, Trinidad and Bermudez, and their Use in Highway Construction, Clifford Richardson | 19 |
| Asphalts, Trinidad and Bermudez, and their Use in Highway Construction, Clifford Richardson | 170 |
| Auer, John, Some Aspects of Anaphylaxis | 434 |
| Basil Valentine: A Seventeenth-century Hoax, John Maxson Stillman | 591 |
| Bauer, John, Rising Prices and the Public | 564 |
| Bees which visit only One Species of Flowers, John H. Lovell | 197 |
| Bermudez, and Trinidad, Asphalts, and their Use in Highway Construction, Clifford Richardson | 19 |
| Bermudez, and Trinidad, Asphalts, and their Use in Highway Construction, Clifford Richardson | 170 |
| Boss, Lewis | 618 |
| Botanical Excursion, A Round the World, Charles J. Chamberlain | 417 |
| British Association, Address of the President | 414 |
| Britton, W. E., The Role of the House Fly and Certain Other Insects in the Spread of Human Diseases | 36 |
| Brues, Charles T., Insects as Agents in the Spread of Disease | 537 |
| Cajori, Florian, Gauss and his American Descendants | 105 |
| "The Evolution of the Dollar Mark | 521 |
| Calendar, Reforming the, Oberlin Smith | 582 |
| Cannon, W. A., Some Features of the Root Systems of the Desert Plants | 90 |
| Cannon, W. B., A Consideration of the Nature of Hunger | 291 |
| Carlton, Frank T., History-making Forces | 349 |
| Carnegie Foundation for the Advancement of Teaching, Activities of | 102 |
| "Chamberlain, Charles J., A Round the World Botanical Excursion | 417 |
| China's Great Problem, Thomas T. Read | 457 |
| Cold Storage Problems, P. G. Heinemann | 153 |
| Cole, Leon J., The Relation of Eugenics to Euthenics | 475 |
| College, American, Function of the, A. K. Rogers | 574 |
| Color, Hair, and Genius, Charles Kassel | 284 |
| Commission Government, The Real Problem of, Oswald Ryan | 275 |
| Congresses, International Scientific, meeting in America | 412 |
| Conservation Problem, The World 's Most Important, Stewart Paton | 163 |
| Cooperative Engineering Course of the University of Cincinnati | 100 |
| Cotton Goods, Permanent Fireproofing of, William Henry Perkin | 397 |
| Death Rate, Decreasing, and Vital Statistics | 617 |
| Dedication of New Allegheny Observatory | 409 |
| "of the New York State Education Building | 517 |
| Descendants, American, of Gauss, Florian Cajori | 105 |
| Desert Plants, Some Features of Root Systems, W. A. Cannon | 90 |
| "Rubber Plant, the Guayule, F. E. Lloyd | 313 |
| Disease, Human, the Role of the House Fly in the Spread of, W. E. Britton | 36 |
| "Hookworm, Eradication of | 205 |
| "Insects as Agents in the Spread of, Charles T. Brues | 537 |
| Dollar Mark, Evolution of, Florian Cajori | 521 |
| Economic, Interpretation of Present Politics, C. C. Arbuthnot | 183 |
| "Orthodoxy, the Revival of, S. M. Patten | 246 ​ |
| Education, Psychology and Philosophy, Rousseau's Contributions to, W. B. Pillsbury | 331 |
| "Administrative Peril in, Joseph Jastrow | 495 |
| "Building, New York State, Dedication of | 517 |
| Engineering Course, Cooperative, of the University of Cincinnati | 100 |
| Eradication of Hookworm Disease | 205 |
| Esthetics, The Physiological Basis of, Henry Sewall | 61 |
| Eugenics, Congress, The First International | 310 |
| "Relation to Euthenics, Leon J. Cole | 475 |
| Evolution of the Dollar Mark, Florian Cajori | 521 |
| Fecundity, The Inheritance of, Raymond Pearl | 364 |
| Fireproofing, Permanent, of Cotton Goods, William Henry Perkin | 397 |
| Flowers, Bees which Visit only One Species of, John H. Lovell | 197 |
| Fly, House, and Certain Other Insects, Role in the Spread of Human Diseases, W. E. Britton | 36 |
| Football Men, and Smoking, Frederick J. Pack | 336 |
| Forces, History-making, Frank T. Carlton | 349 |
| Forestry, Practical, explained, C. C. Andrews | 531 |
| Function of the American College, A. J. Rogers | 574 |
| Gauss and his American Descendants, Florian Cajori | 105 |
| Genesis of Individual and Social Surplus, Alvan A. Tenney | 551 |
| Genius and Hair-color, Charles Kassel | 284 |
| Glaser, Otto C., Is a Scientific Explanation of Life Possible? | 78 |
| Government, Commission, The Real Problem of, Oswald Ryan | 275 |
| Grasshoppers, Modern warfare against, F. L. Washburn | 465 |
| Guayule, A Desert Rubber Plant, F. E. Lloyd | 313 |
| Gudger, E. W., George Marcgrave, the First Student of American Natural History | 250 |
| Hair-color, and Genius, Charles Kassel | 284 |
| Heinemann, P. G., Cold Storage Problems | 153 |
| Helps to Studying, Joseph W. Richards | 193 |
| Highway Construction, Trinidad and Bermudez Asphalts and their Use in, Clifford Richardson | 19 |
| Highway Construction, Trinidad and Bermudez Asphalts and their Use in, Clifford Richardson | 170 |
| Hill, Leonard, Stuffy Rooms | 374 |
| Hindu-Arabic Numerals, Edmund Raymund Turner | 601 |
| History-making Forces, Frank T. Carlton | 349 |
| Hoax, Seventeenth-century, Basil Valentine, John Maxson Stillman | 591 |
| Holes in the Air, W. J. Humphreys | 50 |
| Hookworm Disease, Eradication of | 205 |
| House Fly, and Certain Other Insects, Role in the Spread of Human Diseases, W. E. Britton | 36 |
| Humphreys, W. J., Holes in the Air | 50 |
| Hunger, A Consideration of the Nature of, W. B. Cannon | 291 |
| Individual and Social Surplus, Genesis of, Alvan A. Tenney | 551 |
| Industrialism, Charles S. Slichter | 355 |
| Inheritance of Fecundity, Raymond Pearl | 364 |
| Insects as Agents in the Spread of Disease, W. E. Britton | 36 |
| "Charles T. Brues | 537 |
| Interests, Permanence of, and Relation to Abilities, Edward L. Thorndike | 449 |
| International, Eugenics Congress, The First | 310 |
| "Scientific Congresses meeting in America | 412 |
| Jastrow, Joseph, The Administrative Peril in Education | 495 |
| Jews, are they a "Pure Race"? Abram Lipsky | 70 |
| Kassel, Charles, Genius and Hair-color | 284 |
| Keyes, Charles R., Wind-graved Mesas and their Message | 227 |
| Lamps, Old, for New, John Mills | 238 |
| Life, Is a Scientific Explanation Possible? Otto C. Glaser | 78 |
| Lipsky, Abram, Are the Jews a "Pure Race"? | 70 |
| Lloyd, F. E., The Guayule, A Desert Rubber Plant | 313 |
| Lovell, John H., Bees which visit only One Species of Flowers | 197 |
| Macartney, Clarence Edward, The Minister's Son | 345 |
| Marcgrave, George, the First Student of American Natural History, E. W. Gudger | 250 |
| Medicine, Research in, Richard M. Pearce | 5 |
| Medicine, Research in, Richard M. Pearce | 115 |
| Medicine, Research in, Richard M. Pearce | 209 |
| "Award of the Nobel Prize in | 615 |
| Mesas, Wind-graved, and their Message, Charles R. Keyes | 227 |
| Mills, John, Old Lamps for New | 238 |
| Minister's Son, The, Clarence Edward Macartney | 345 |
| Modern Thought, Edward F. Williams | 133 ​ |
| Natural History, American, George Marcgrave, the First Student of, E. W. Gudger | 250 |
| Negroes who owned Slaves, Calvin Dill Wilson | 483 |
| New Allegheny Observatory | 409 |
| New York State Education Building, Dedication of | 517 |
| Nobel Prize in Medicine | 615 |
| Numerals, Hindu-Arabic, Edmund Raymond Turner | 601 |
| Old Lamps for New, John Mills, 238 Orthodoxy, Economic, The Revival of, S. N. Patten | 246 |
| Pack, Frederick J., Smoking and Football Men | 336 |
| Paton, Stewart, The World's Most Important Conservation Problem | 163 |
| Patten, S. N., The Revival of Economic Orthodoxy | 246 |
| Pearce, Richard M., Research in Medicine | 5 |
| Pearce, Richard M., Research in Medicine | 115 |
| Pearce, Richard M., Research in Medicine | 209 |
| Pearl, Raymond, The Inheritance of Fecundity | 364 |
| Perkin, William Henry, The Permanent Fireproofing of Cotton Goods | 397 |
| Permanence of Interests and their Relation to Abilities, Edward L. Thorndike | 449 |
| Permanent Fireproofing of Cotton Goods, William Henry Perkin | 397 |
| Philosophy, Psychology and Education, Rousseau's Contributions to, W. B. Pillsbury | 331 |
| Physiological Basis of Esthetics, Henry Sewall | 61 |
| Pillsbury, W. B., Rousseau's Contributions to Psychology, Philosophy and Education | 331 |
| Plants, Desert, Some Features of Root Systems, W. A. Cannon | 90 |
| Politics, Present, Economic Interpretation of, C. C. Arbuthnot | 183 |
| Population of the United States in 1910 | 204 |
| Practical Forestry explained, C. C. Andrews | 531 |
| Prices, Rising, and the Public, John Bauer | 564 |
| Progress of Science | 100 |
| Progress of Science | 204 |
| Progress of Science | 308 |
| Progress of Science | 409 |
| Progress of Science | 517 |
| Progress of Science | 615 |
| Psychology, Philosophy and Education, Rousseau's Contributions to, W. B. Pillsbury | 331 |
| "Pure Race," are the Jews a? Abram Lipsky | 70 |
| Read, Thomas T., China's Great Problem | 457 |
| Reforming the Calendar, Oberlin Smith | 582 |
| Research in Medicine. Richard M. Pearce | 5 |
| Research in Medicine. Richard M. Pearce | 115 |
| Research in Medicine. Richard M. Pearce | 209 |
| Richards, Joseph W., Helps to Studying | 193 |
| Richardson, Clifford, Trinidad and Bermudez Asphalts and their Use in Highway Construction | 19 |
| Richardson, Clifford, Trinidad and Bermudez Asphalts and their Use in Highway Construction | 170 |
| Rising Prices and the Public, John Bauer | 564 |
| Rogers, A. K., The Function of the American College | 574 |
| Rooms, Stuffy, Leonard Hill | 374 |
| Root Systems of the Desert Plants, Some Features of the, W. A. Cannon | 90 |
| Round-the-World Botanical Excursion, Charles J. Chamberlain | 417 |
| Rousseau's Contributions to Psychology, Philosophy and Education, W. B. Pillsbury | 331 |
| Royal Society, The Two-hundred and Fiftieth Anniversary of the | 308 |
| Rubber, Synthetic | 206 |
| "Plant, A Desert, The Guayule, F. E. Lloyd | 313 |
| Ryan, Oswald, The Real Problem of Commission Government | 275 |
| Schafer, Edward A., Address of the President of the British Association | 414 |
| Scientific, Explanation of Life, is it Possible? Otto C. Glaser | 78 |
| "Items | 104 |
| "Items | 208 |
| "Items | 312 |
| "Items | 415 |
| "Items | 520 |
| "Items | 619 |
| "Congresses, International, meeting in America | 412 |
| Seventeenth-century Hoax, Basil Valentine, John Maxson Stillman | 591 |
| Sewall, Henry, The Physiological Basis of Esthetics | 61 |
| Slaves, Negroes who owned, Calvin Dill Wilson | 483 |
| Slighter, Charles S., Industrialism | 355 |
| Smith, Oberlin, Reforming the Calendar | 582 |
| Smoking and Football Men, Frederick J. Pack | 336 |
| Statistics, Vital, and the Decreasing Death Rate | 617 |
| Stillman, John Maxson, Basil Valentine: A Seventeenth-century Hoax | 591 |
| Storage, Cold, Problems, P. G. Heinemann | 153 |
| Studying, Helps to, Joseph W. Richards | 193 |
| Stuffy Rooms, Leonard Hill | 374 |
| Surplus, Individual and Social, Genesis of, Alvan A. Tenney | 551 |
| Synthetic Rubber | 206 |
| Teaching, The Activities of the Carnegie Foundation for the Advancement of | 102 |
| Tenney, Alvan A., The Genesis of Individual and Social Surplus | 551 ​ |
| Thorndike, Edward L., The Permanence of Interests and their Relation to Abilities | 449 |
| Thought, Modern, Edward F. Williams | 133 |
| Trinidad and Bermudez Asphalts and their Use in Highway Construction, Clifford Richardson | 19 |
| Trinidad and Bermudez Asphalts and their Use in Highway Construction, Clifford Richardson | 170 |
| Turner, Edmund Raymond, The Hindu Arabic Numerals | 601 |
| United States, Population of, in 1910 | 204 |
| ""Agricultural Products of | 519 |
| University of Cincinnati, and its Cooperative Engineering Course | 100 |
| Valentine, Basil: A Seventeenth-century Hoax, John Maxson Stillman | 591 |
| Vital Statistics and the Decreasing Death Rate | 617 |
| Washburn, F. L., Modern Warfare against Grasshoppers | 465 |
| Williams, Edward F., Modern Thought | 133 |
| Wilson, Calvin Dill, Negroes, who owned Slaves | 483 |
| Wind-graved Mesas and their Message, Charles R. Keyes | 227 |
| World's Most Important Conservation Problem, Stewart Paton | 163 |