Issue: 19070601

Saturday, June 1, 1907
JUNE, 1907
2
True
71
Wednesday, October 22, 2014

Articles
cover
481
481
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THE POPULAR SCIENCE MONTHLY
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PopularScience_19070601_0071_002_0001.xml
article
481
481,482,483,484,485,486,487,488,489,490,491,492,493,494,495,496
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THE PROBLEM OF AGE, GROWTH AND DEATH.
I. THE CONDITION OF OLD AGE
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CHARLES SEDGWICK MINOT
THE subject of age has ever been one which has attracted human thought. It leads us so near to the great mysteries that all thinkers have contemplated it, and many are the writers who from the literary point of view have presented us, sometimes with profound thought, often with beautiful images connected with the change from youth to old age.
PopularScience_19070601_0071_002_0002.xml
article
497
497,498,499,500,501,502,503,504,505,506,507,508,509,510,511,512,513,514,515,516,517
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THE PROGRESS OF OUR KNOWLEDGE OF THE FLORA OF NORTH AMERICA
CANADENSIUM PLANTARUM,
HISTORIA.
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PROFESSOR LUCIEN MARCUS UNDERWOOD
WHATEVER may be the avenue of approach to the subject of botany as a science, whether we work out the details of the development, maturation and division of the elements within the single cell, or seek to trace the race history through the detailed development of a single organism from egg to egg again, or whether we approach it through either the mutations or the variations of a single species, the last problem of investigation as well as the first will bear directly on the question: What are the relations of plants to each other in the natural system of classification?
PopularScience_19070601_0071_002_0003.xml
article
518
518,519,520,521,522,523
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NOTES ON THE DEVELOPMENT OF TELEPHONE SERVICE
IX. TELEPHONE LINE CONSTRUCTION.
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FRED DELAND
IN 1876 the wires used for telegraph circuits were usually of iron or steel, because the tensile strength permitted of long spans and comparatively long sag. At that period hard-drawn copper line wire was unknown, and it is problematical whether the volume of traffic passing over the average telegraph wire at that time, outside of the main trunk lines, would have justified the heavy initial investment required to string copper circuits.
PopularScience_19070601_0071_002_0004.xml
article
524
524,525,526,527,528,529
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THE VALUE OF SCIENCE
4. 'Nominalism' and 'the Universal Invariant'
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M. H. POINCARÉ
IF from facts we pass to laws, it is clear that the part of the free activity of the scientist will become much greater. But did not M. LeRoy make it still too great? This is what we are about to examine. Recall first the examples he has given. When I say: Phosphorus melts at 44°, I think I am enunciating a law; in reality it is just the definition of phosphorus; if one should discover a body which, possessing otherwise all the properties of phosphorus, did not melt at 44°, we should give it another name, that is all, and the law would remain true.
PopularScience_19070601_0071_002_0005.xml
article
530
530,531,532,533,534,535,536,537,538,539,540,541
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THE ACQUISITION OF LANGUAGE AND ITS RELATION TO THOUGHT
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ALEX. HILL
FOR a few years the great Samuel Johnson kept an academy for young gentlemen. It was not a success, despite the fact that he had the two Garricks as pupils. Johnson was not fitted for the work. Yet, little as Johnson succeeded as a teacher, he was himself a monument of mental training—his memory colossal, his style the classic for the English language, his wit so keen as to make Boswell's six volumes of biography perennially good reading.
PopularScience_19070601_0071_002_0006.xml
article
542
542,543,544,545,546,547,548
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HYGIENIC REQUIREMENTS IN THE PRINTING OF BOOKS AND PAPERS
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PROFESSOR EDMUND B. HUEY
THE cheapness and universal prevalence of printed matter, and the general enactment of compulsory education laws which fasten the reading habit upon all, give the problems of the hygiene of reading a universal and very great significance.
PopularScience_19070601_0071_002_0007.xml
article
549
549,550,551,552,553,554,555,556
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THE WASTE OF CHILDREN
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DR. GEO. B. MANGOLD
LESS than two hundred years ago not more than one fourth of the children born in London ever reached their fifth year of life. The rest were ruthlessly swept aside and died without adding a single iota to the sum of human service. It is a matter of utmost importance to know under what conditions an advance in population is secured.
PopularScience_19070601_0071_002_0008.xml
article
557
557,558,559,560,561,562,563,564
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A BLAZING BEACH
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D. P. PENHALLOW
IN December, 1905, an account was given in Science1 of a remarkable phenomenon which was described as 'A Blazing Beach' as observed at Kittery Point, Maine, and an attempt was then made to bring forward an explanation which would satisfactorily account for all the observed facts.
PopularScience_19070601_0071_002_0009.xml
article
565
565,566,567,568,569,570,571,572
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THE PROGRESS OF SCIENCE
LORD LISTER
THE CENTENARY OF THE BIRTH OF LOUIS AGASSIZ
PREVALENCE OF THE PLAGUE IN INDIA
THE POPULATION OF THE UNITED STATES.
SCIENTIFIC ITEMS
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LISTER was born on April 5, 1827, and his eightieth birthday has been the occasion for congratulations from all parts of the world. A large and influential international committee has resolved to commemorate the occasion by publishing in quarto form a collection of his scientific works.
PopularScience_19070601_0071_002_0010.xml
article
573
573,574,575,576
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INDEX
NAMES OF CONTRIBUTORS ARE PRINTED IN SMALL CAPITALS
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Agassiz, Louis, 566; EDWARD EVERETT HALE, 305 Age, Growth and Death, the Problem of, CHARLES SEDGWICK MINOT, 481 Air, the Sanitation of, KONRAD MEIER, 19 Alaska, Glacial Erosion in, RALPH S. TARR, 99 Alcohol, Denatured, S. LAWRENCE BIGELOW, 243 Arts, The Classification of, IRA HOWERTH, 429 Astronomy, Problems of, 383 Audubon, John James, C. HART MERRIAM, 301 Automaton, Is Man an, GEORGE STUART FULLERTON, 149 BABBITT, E. H., A Vocabulary Test, 378 Baird, Spencer Fullerton, HUGH M. SMITH, 308 Beach, A Blazing, D. P. PENHALLOW, 557 Berthelot and Moissan, 475 BIGELOW, S. LAWRENCE, Denatured Alcohol, 243 Blazing Beach, D. P. PENHALLOW, 557 Body, Is the Mind in the, GEORGE STUART FULLERTON, 452 Books and Papers, Hygienic Requirements in the Printing of, EDMUND B. HUEY, 542 Britton, N. L., John Torrey, 297 Brooks, William Keith, JOSEPH LEIDY, 311 BROWN, CHARLES W.
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