Illustrated Catalogue of the Museum of Comparative Zoology, at Harvard College, Vol. 4 PDF ePub eBook

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Illustrated Catalogue of the Museum of Comparative Zoology, at Harvard College, Vol. 4 free pdf Excerpt from Illustrated Catalogue of the Museum of Comparative Zoology, at Harvard College, Vol. 4: Deep-Sea Corals The deep-sea corals described in these pages were collected in the years 1867, 1868, and 1869, during the expeditions made for the exploration of the Gulf Stream by the United States Coast Survey, B. Peirce, Superintendent, in the steamers Corwin and Bibb, Acting-Master Robert Platt, U. S. N., commanding. It will not be superfluous to preface their description by a condensed statement of the successive steps taken by the Coast Survey in deep-sea researches, and by a short review of our present knowledge of the constitution of the bottom of the sea on the Atlantic coast of the United States. The subject has been already treated in a paper published by me in Petermann's Geographishe Mittheilungen, but it may be well to repeat it here for the benefit of English readers. The first step of the investigation may be said to have been taken by the late Professor A. D. Bache, on his assuming the duties of superintendent of the United States Coast Survey in 1844, when he ordered the preservation of the specimens brought up by the lead during the progress of the hydrographical operations. The object was twofold, - a practical one, to check the indications of the character of bottom laid down on the charts by the hydrographers- and a scientific one, the formation of a collection illustrating the character of the bottom and the distribution of the materials constituting it along our coast. The greater number of the specimens were obtained at first inside of the hundred-fathom line, but the deeper waters of the Gulf Stream soon began to add collections of still greater interest, if of less extent. Simple contrivances were substituted for the usual tallow arming the lead, so as to bring up the sand or mud in sufficient and uncontaminated quantities. Every specimen is placed in a small bottle, labelled with the date, geographical position, and depth, and preserved in cabinets arranged for the purpose in the Coast Survey Office in Washington. The microscopical examination of the collection was begun by the late Professor J. W. Bailey, of the Military Academy at West Point, and after his death by myself, in the intervals of other duties. 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."

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Details Book

Author : L F De Pourtales
Publisher : Forgotten Books
Data Published : 27 September 2015
ISBN : 1332118968
EAN : 9781332118960
Format Book : PDF, Epub, DOCx, TXT
Number of Pages : 114 pages
Age + : 15 years
Language : English
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  • Illustrated Catalogue of the Museum of Comparative Zoology, at Harvard College, Vol. 4 free pdfIllustrated Catalogue of the Museum of Comparative Zoology, at Harvard College, Vol. 4

    . Excerpt from Illustrated Catalogue of the Museum of Comparative Zoology, at Harvard College, Vol. 4: Deep-Sea Corals The deep-sea corals described in these pages were collected in the years 1867, 18