IX. Contributions to the Natural History of the Acalephae of North America PDF Download
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Author: Louis Agassiz
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ISBN:
Category :
Languages : en
Pages : 112
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Author: Louis Agassiz
Publisher:
ISBN:
Category :
Languages : en
Pages : 112
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Book Description
Author: Louis Agassiz
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ISBN:
Category :
Languages : en
Pages :
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Author: Louis Agassiz
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Category :
Languages : en
Pages :
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Author: Louis Agassiz
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Category : Ctenophora
Languages : en
Pages : 204
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Author: Louis Agassiz
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Category :
Languages : en
Pages :
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Author: L. Agassiz
Publisher: Forgotten Books
ISBN: 9781333360382
Category : Science
Languages : en
Pages : 194
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Excerpt from Contributions to the Natural History of the Acalephae of North America The study of such animals is therefore of high physiological importance, as it will enlarge our views of animal functions, and give more precision to our ideas of cellular life; and the more so, because in this, as well as in several other naked-eyed Medusa, we can satisfy ourselves with the greatest ease, that the different organs which per form here different functions are entirely and exclusively composed Of cells; not in the same sense as it can be said of the body of higher organisms, but strictly so, the cells here not undergoing any extensive metamorphosis by which they are transformed into distinct tissues of different structures, though derived from cells. Here they preserve the appearance of indisputable cells, combined in various ways, slightly modified in differ ent parts of the body, but everywhere to be recognized as cells although performing the most heterogeneous functions. Here a heap of large cells, containing a crystal-like, more consistent uid, constitutes the main mass of the body. Other series of somewhat elongated, more or less bottle-shaped, contractile cells, elongating and shortening alternate ly, constitute bundles or layers of an apparently fibrous tissue, which is, however, only an accumulation of slightly modified cells representing the muscular system, and acting as such with as much energy as the striated muscles; though here we have no muscular bundles proper, no primitive fibres whatever, no striation upon the contractile tissue, but cells, the walls of which are contractile and act as muscles. (plate V.; the parts in blue.) 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: Louis Agassiz (Palaeontologist, Geologist, Glaciologist, Switzerland, United States)
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Category :
Languages : en
Pages :
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Author: Louis 1807-1873 Agassiz
Publisher: Wentworth Press
ISBN: 9781374629172
Category : History
Languages : en
Pages : 218
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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.
Author: Alexander Agassiz
Publisher:
ISBN:
Category : Literary Criticism
Languages : en
Pages : 258
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Publisher: CUP Archive
ISBN:
Category :
Languages : en
Pages : 630
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