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Author: Boston Society of Natural History (BOSTON, Mass.)
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Category :
Languages : en
Pages :
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Author: Boston Society of Natural History (BOSTON, Mass.)
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Boston Society of Natural History
Publisher: Forgotten Books
ISBN: 9781334698996
Category : Science
Languages : en
Pages : 650
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Excerpt from Memoirs Read Before the Boston Society of Natural History, Vol. 1: Being a New Series of the Boston Journal of Natural History The class of Polyps has undergone many changes, as it has been found necessary, from time to time, to remove groups belonging to other classes, confounded with it so long as their structure was imperfectly understood. The true polyps were for the first time divided into the two natural orders characterized by the number and structure of the tentacles, by milne-edwards and Audouin, in 1828, but at that time no special names were applied to the two groups thus established. 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: Boston Society of Natural History
Publisher:
ISBN:
Category : Natural history
Languages : en
Pages : 318
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Author: Boston Society of Natural History
Publisher: Forgotten Books
ISBN: 9781334418150
Category : Science
Languages : en
Pages : 738
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Excerpt from Memoirs Read Before the Boston Society of Natural History, Vol. 5: Being a New Series of the Boston Journal of Natural History; 1895-1904 My own microchemical studies would lead to the inference, that the reserve material Of the seeds Of Liliaceae is, in some cases at least, a complex body, and, until we understand its chemical nature better, it is more convenient for botanists to employ a term which shall not entangle them in chemical difficulties. Hence, in this work, reserve cellulose is the material stored on the walls Of the endosperm cells, which is to be distinguished from the original membrane, and which is used up during germination. The unfailing chemical characteristic Of the reserve cellulose, of all the seeds examined, is its easy solubility with hot, weak, mineral acids; a characteristic which points to the conclusion that the reserve cellulose Of the Liliaceae is. Schulze's hemi cellulose. 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: Boston Society of Natural History
Publisher: Arkose Press
ISBN: 9781344932820
Category :
Languages : en
Pages : 674
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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: Boston Society of Natural History
Publisher:
ISBN:
Category : Natural history
Languages : en
Pages : 668
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Author: Boston Society of Natural History
Publisher: Forgotten Books
ISBN: 9780282260545
Category : Science
Languages : en
Pages : 734
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Excerpt from Memoirs Read Before the Boston Society of Natural History, 1886-1893, Vol. 4: Being a New Series of the Boston Journal of Natural History It was the writer's intention originally to limit the discussion to mammalian bones, and this plan has been followed in the main, but he has been led in one or two instances to refer to those of other classes. Let 1is now pass in review, the proximal ends of the humerus and femur of a number of mammals, beginning with man, and having compared the bones of the two extremities in the same species together, then compare each with the corresponding bones of other animals. 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: Boston Society of Natural History
Publisher:
ISBN:
Category : Natural history
Languages : en
Pages :
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Author: Boston Society of Natural History
Publisher: Forgotten Books
ISBN: 9781334732515
Category : Science
Languages : en
Pages : 644
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Excerpt from Memoirs Read Before the Boston Society of Natural History, Vol. 3: Being a New Series of the Boston Journal of Natural History; 1878-1894 From these observations, it will be seen that the muscular system of Distomum resem bles that of the Cestods more closely than it does that of the Planarians. But the exist ence of the single row of external longitudinal muscular fibres should be especially noted as bearing upon the homologies of the muscular layers of Plathelminths. This subject has been discussed in my paper (see above) in Semper's Arbeiten. It also overthrows, beyond all question, Schneider's1 attempt to classify worms according to their muscular systems, because some species of Taenia do, and others do not, have the external longitudi nal layer, and it is evident that orders and classes cannot be founded upon characters that are not constant within the limits of one genus.2. 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: University College, London. Library
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Category : Learned institutions and societies
Languages : en
Pages : 288
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