Acknowledgments

TO COPE ALONE and unaided with a subject so vast, so complex, and so infinitely mysterious as the sea would be a task not only cheerless but impossible, and I have not attempted it. Instead, on every hand I have been given the most friendly and generous help by those whose work is the foundation and substance of our present knowledge of the sea. Specialists on many problems of the ocean have read chapters dealing with their fields of study and have made comments and suggestions based on their broad understanding. For such constructive help I am indebted to Henry B. Bigelow, Charles F. Brooks, and Henry C. Stetson of Harvard University; Martin W. Johnson, Walter H. Munk, and Francis P. Shepard of the Scrips Institution of Oceanography; Robert Cushman Murphy and Albert Eide Parr of the American Museum of Natural History; Carl O. Dunbar of Yale University; H. A. Marmer of the U.S. Coast and Geodetic Survey; R. C. Hussey of the University of Michigan; George Cohee of the U.S. Geological Survey; and Hilary B. Moore of the University of Miami.

Many others have cheerfully gone to great trouble to help locate elusive documents, have sent me unpublished information and comments, and in many other ways have lightened my task. Among these are H. U. Sverdrup of the Norsk Polarinstitutt in Oslo; L. H. W. Cooper of the Laboratory at Plymouth; Thor Heyerdahl of Oslo; J. W. Christensen, Jens Eggvin, and Gunnar Rollefsen of the Fiskeridirektoratets Havforskingsinstitutt in Bergen; H. Blegvad, Secretary General of the International Council for the Exploration of the Sea; Hans Pettersson of the Oceanografiska Institutet in Göteborg; and, in the United States, John Putnam Marble of the National Research Council; Richard Fleming of the Hydrographic Office; Daniel Merriman of the Bingham Oceanographic Laboratory; Edward H. Smith of the Woods Hole Oceanographic Institution; W. N. Bradley and H. S. Ladd of the U.S. Geological Survey; Maurice Ewing of Columbia University; and F. R. Fosberg of George Washington University.

The front end paper is reproduced from a portion of the map, Il Mare di Amazones, by permission of the New York Public Library.

The library resources of many Government and private institutions have been placed freely at my disposal, and my special thanks are due Ida K. Johnson, Reference Librarian of the Interior Department Library, whose tireless researches and thorough knowledge of the available literature have been unfailingly helpful.

My absorption in the mystery and meaning of the sea have been stimulated and the writing of this book aided by the friendship and encouragement of William Beebe.

The leisure to write the book and the means of carrying on some of the studies that contributed to it were in large part made possible by the award of the Eugene F. Saxton Memorial Fellowship.

Silver Spring, Maryland

R. L. C.

January 1951

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