Science Progress in the Twentieth Century, Vol. 5

Science Progress in the Twentieth Century, Vol. 5 PDF

Author: H. E. Armstrong

Publisher: Forgotten Books

Published: 2017-10-11

Total Pages: 768

ISBN-13: 9780265160268

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Excerpt from Science Progress in the Twentieth Century, Vol. 5: A Quarterly Journal of Scientific Work and Thought; July 1910 to April 1911 The simpler name star map is here applied to the chart generally known as the Astrographic Chart, because this latter conveys a suggestion Of technicality which is absent from the project. What astronomers in different parts of the world are really about is the making of a large and much more detailed map Of the stars than has hitherto been produced. The map is being made by photography; but though the word astrographic has been coined for use when photo graphy is applied to the stars, the work does not involve much technicality that is not familiar to the users of an ordinary Kodak. In three details only does the work of the astronomer differ from that of the amateur photographer: he uses a much longer camera; he drives the camera by clockwork so that it may follow the stars; and he takes pictures at night instead of in the daytime. It may perhaps be added that he uses the light emitted by the stars, instead of photographing objects by the reflected light of the sun. But of these details more presently. 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.

Science Progress in the Twentieth Century, 1910, Vol. 5

Science Progress in the Twentieth Century, 1910, Vol. 5 PDF

Author: H. E. Armstrong

Publisher: Forgotten Books

Published: 2015-06-25

Total Pages: 769

ISBN-13: 9781330394830

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Excerpt from Science Progress in the Twentieth Century, 1910, Vol. 5: A Quarterly Journal of Scientific Work Thought The simpler name "star map" is here applied to the chart generally known as the " Astrographic Chart," because this latter conveys a suggestion of technicality which is absent from the project. What astronomers in different parts of the world are really about is the making of a large and much more detailed map of the stars than has hitherto been produced. The map is being made by photography; but though the word "astrographic" has been coined for use when photography is applied to the stars, the work does not involve much technicality that is not familiar to the users of an ordinary Kodak. In three details only does the work of the astronomer differ from that of the amateur photographer: he uses a much longer camera; he drives the camera by clockwork so that it may follow the stars; and he takes pictures at night instead of in the daytime. It may perhaps be added that he uses the light emitted by the stars, instead of photographing objects by the reflected light of the sun. But of these details more presently. Let us first consider what is the nature of a map of the stars, as this differs somewhat in character from the maps of the earth's surface with which we are familiar. There is no question of finding our way, no question of delimiting property, no question of showing hills and valleys. A map of the stars is of a more monotonous character, being practically limited to showing the exact positions and the brightnesses of individual points of light. 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.

Science Progress in the Twentieth Century, Vol. 2

Science Progress in the Twentieth Century, Vol. 2 PDF

Author: N. H. Alcock

Publisher: Forgotten Books

Published: 2017-10-23

Total Pages: 182

ISBN-13: 9780266615170

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Excerpt from Science Progress in the Twentieth Century, Vol. 2: A Quarterly Journal of Scientific Thought; No. 5, July 1907 I may point out here that the first and second groups of tumours behave on transplantation as embryonic and adult tissues do, by exhibiting limited powers of proliferation, with the difference between cancer and embryonic tissue, that the former does not differentiate into an adult form. We are therefore able to place a positive value on the negative efforts which have been made to produce tumours by propagating normal tissues, and we are able to establish all gradations from the limited growth of normal tissues under experimental conditions, up to the remarkable phenomenon exhibited by the unlimited growth of the cells of some cancers under the same conditions. Thus experiment has bridged over the gulf between normal and cancerous tissue so far as their powers of growth are concerned. The limited growth of normal tissues, when transplanted, is independent of any extraneous organism. There is no need to assume such a dependence when cancerous tissues exhibit corresponding limitations; and if not, why should it be necessary to assume this intervention when the powers of growth pass insensibly through all gradations to those of unlimited amount? 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.

Science Progress in the Twentieth Century

Science Progress in the Twentieth Century PDF

Author: Anonymous

Publisher: Palala Press

Published: 2016-04-27

Total Pages: 382

ISBN-13: 9781354900826

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This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

Quantum Generations

Quantum Generations PDF

Author: Helge Kragh

Publisher: Princeton University Press

Published: 2002-03-24

Total Pages: 514

ISBN-13: 9780691095523

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At the end of the nineteenth century, some physicists believed that the basic principles underlying their subject were already known, and that physics in the future would only consist of filling in the details. They could hardly have been more wrong. The past century has seen the rise of quantum mechanics, relativity, cosmology, particle physics, and solid-state physics, among other fields. These subjects have fundamentally changed our understanding of space, time, and matter. They have also transformed daily life, inspiring a technological revolution that has included the development of radio, television, lasers, nuclear power, and computers. In Quantum Generations, Helge Kragh, one of the world's leading historians of physics, presents a sweeping account of these extraordinary achievements of the past one hundred years. The first comprehensive one-volume history of twentieth-century physics, the book takes us from the discovery of X rays in the mid-1890s to superstring theory in the 1990s. Unlike most previous histories of physics, written either from a scientific perspective or from a social and institutional perspective, Quantum Generations combines both approaches. Kragh writes about pure science with the expertise of a trained physicist, while keeping the content accessible to nonspecialists and paying careful attention to practical uses of science, ranging from compact disks to bombs. As a historian, Kragh skillfully outlines the social and economic contexts that have shaped the field in the twentieth century. He writes, for example, about the impact of the two world wars, the fate of physics under Hitler, Mussolini, and Stalin, the role of military research, the emerging leadership of the United States, and the backlash against science that began in the 1960s. He also shows how the revolutionary discoveries of scientists ranging from Einstein, Planck, and Bohr to Stephen Hawking have been built on the great traditions of earlier centuries. Combining a mastery of detail with a sure sense of the broad contours of historical change, Kragh has written a fitting tribute to the scientists who have played such a decisive role in the making of the modern world.

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