Carnegie Institution Of Washington Publication

Author : Carnegie Institution of Washington
ISBN : 1110343485
Genre : History
File Size : 67.11 MB
Format : PDF, ePub
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This is a pre-1923 historical reproduction that was curated for quality. Quality assurance was conducted on each of these books in an attempt to remove books with imperfections introduced by the digitization process. Though we have made best efforts - the books may have occasional errors that do not impede the reading experience. We believe this work is culturally important and have elected to bring the book back into print as part of our continuing commitment to the preservation of printed works worldwide.
Category: History

Fauna Of The Caves Of Yucatan

Author : Arthur Sperry Pearse
ISBN : 1258748592
Genre :
File Size : 66.45 MB
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Additional Contributors Include Joseph C. Chamberlin, Ralph V. Chamberlin, B. C. Chitwood, And Many Others.
Category:

The Proteins Of The Wheat Kernel Classic Reprint

Author : Thomas B. Osborne
ISBN : 1332438350
Genre : Science
File Size : 63.45 MB
Format : PDF
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Excerpt from The Proteins of the Wheat Kernel Of the protein substances used as food none is of more importance than those contained in the seeds of wheat. Although these bodies attracted the attention of investigators more than one hundred years ago and have since then been many times the subject of study, the published statements respecting them are so conflicting and uncertain that it has heretofore been impossible to know what the truth regarding them actually is. With the purpose of clearing up the existing confusion and determining the real value of the evidence offered, as well as extending, as far as possible, our knowledge of these important substances, the writer some years ago undertook an investigation of this seed which has recently been concluded by work done under grants from the Carnegie Institution of Washington. As the results of these investigations have been published from time to time in a number of different papers, appearing in four different journals, it has been thought desirable to bring all this work together in one paper. In so doing the details have been reproduced in full, for the nature of the evidence is such that its value largely consists in concordant results of many experiments, repeated under different conditions, since it is not yet possible to establish the chemical individuality of different protein substances by demonstrating their possession of definite physical properties, as may be done with the simpler organic compounds. The experience of the-writer in his endeavors to understand and repeat the work of many of his predecessors has made him feel the importance of these details to future workers along the same lines and is his excuse for giving with so much minuteness the results of his own work, which to those not familiar with the difficulties of the subject must appear to a large extent unnecessary. In order to make this work available to those who wish simply to know the results, a comprehensive summary of this paper is given at the end of this publication, and the details of the many operations and experiments need be read only by those who wish to become familiar with these. 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.
Category: Science

Plant Succession An Analysis Of The Development Of Vegetation

Author : Frederic E (Frederic Edward) Clements
ISBN : 1296551903
Genre :
File Size : 33.44 MB
Format : PDF, ePub, Mobi
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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.
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The Building Of The Roman Aqueducts

Author : Esther Boise Van Deman
ISBN : 1578984947
Genre : History
File Size : 84.5 MB
Format : PDF
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?It was to Appius Claudius Crassus, statesman, financier, and even poet, with his colleague in the censorship, that Rome owed its first aqueduct?. While not a new invention, since the system of conveying water from distant sources by artificial channels had been known for centuries in other lands, it was for the Romans a new departure, or better, a new application of their earlier discovery of the use and construction of underground channels for sewers???From IntroductionDuring her time in Rome, Van Deman firmly established the criteria for dating ancient Roman Building construction which still remains a standard. She was not just the first woman Roman field archaeologist. In her investigations of the fundamental problems of the chronology of building materials and methods of construction, she laid the foundations for serious study of Roman architecture.When her observations were confirmed, she decided to apply her method of identification to other buildings and constructions. The results of these studies were published in several articles. After this, she turned to a study of the Roman Aqueducts, which had never gotten any detailed attention. Her ensuing studies and writings specializing in this field are a model of investigation, record, and interpretation
Category: History