Color-names, Color-blindness, and the Education of the Color-sense in Our Schools PDF Download
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Author: Benjamin Joy Jeffries
Publisher:
ISBN:
Category : Color blindness
Languages : en
Pages : 20
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Author: Benjamin Joy Jeffries
Publisher:
ISBN:
Category : Color blindness
Languages : en
Pages : 20
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Book Description
Author: Benjamin Joy Jeffries
Publisher: Forgotten Books
ISBN: 9780259519515
Category : Psychology
Languages : en
Pages : 20
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Book Description
Excerpt from Color-Names, Color-Blindness, and the Education of the Color-Sense in Our Schools Investigation of a railroad accident in Sweden, supposed to be due to color-blindness, led Dr. F. Holmgren, professor of physiology in the University of Upsala, to the belief that the defect must be ftc quent, and hence dangerous on both land and sea. Difficulty arose as to any certain method of detecting it quickly. The absence of any such method has been the especial reason why the defect has hitherto escaped observation. Using the theory of young-helmholtz, and applying a test suggested by Seebeck, he finally brought out his now well-known method with the colored worsteds. By this, and the imitations of it devised here and there, large numbers of persons have been examined all over the world, including both sexes, all colors, ages, and degrees of civilizations, etc. It is a curious fact, that till the expert could test quickly and accurately, the existence of color blindness to the extent now proved remained unknown. It is now admitted that four per cent. Of males are more or less color-blind, and in females not over one-fourth of one per cent. Are thus affected. My own tests, up to the time of writing this, are of males 801 were color-blind, whilst I found but 1 1 females among defect ive in their chromatic sense. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author:
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ISBN:
Category : Education
Languages : en
Pages : 426
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Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 432
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Author: John Dewey
Publisher: Createspace Independent Publishing Platform
ISBN:
Category : Juvenile Nonfiction
Languages : en
Pages : 456
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. Renewal of Life by Transmission. The most notable distinction between living and inanimate things is that the former maintain themselves by renewal. A stone when struck resists. If its resistance is greater than the force of the blow struck, it remains outwardly unchanged. Otherwise, it is shattered into smaller bits. Never does the stone attempt to react in such a way that it may maintain itself against the blow, much less so as to render the blow a contributing factor to its own continued action. While the living thing may easily be crushed by superior force, it none the less tries to turn the energies which act upon it into means of its own further existence. If it cannot do so, it does not just split into smaller pieces (at least in the higher forms of life), but loses its identity as a living thing. As long as it endures, it struggles to use surrounding energies in its own behalf. It uses light, air, moisture, and the material of soil. To say that it uses them is to say that it turns them into means of its own conservation. As long as it is growing, the energy it expends in thus turning the environment to account is more than compensated for by the return it gets: it grows. Understanding the word "control" in this sense, it may be said that a living being is one that subjugates and controls for its own continued activity the energies that would otherwise use it up. Life is a self-renewing process through action upon the environment.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 88
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Author: Jonas E. Alexis
Publisher: Xulon Press
ISBN: 1600347606
Category : Religion
Languages : en
Pages : 413
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Book Description
Alexis convincingly examines the crisis in education from a Christian perspective. (Social Issues)
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 228
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Book Description
EBONY is the flagship magazine of Johnson Publishing. Founded in 1945 by John H. Johnson, it still maintains the highest global circulation of any African American-focused magazine.
Author:
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ISBN:
Category :
Languages : en
Pages : 48
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The Bulletin of the Atomic Scientists is the premier public resource on scientific and technological developments that impact global security. Founded by Manhattan Project Scientists, the Bulletin's iconic "Doomsday Clock" stimulates solutions for a safer world.
Author: Elizabeth P. Bemis
Publisher:
ISBN:
Category : Education
Languages : en
Pages : 942
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