GALWAY, H - Echo Sounding at Sea [British Practice]

London: Sir Isaac Pitman and Sons Ltd, 1951. First Edition. Hardcover. VMery good and sound blue cloth hardcover, No inscriptions or marks. There are 4 black and white photographs of Soundings and many drawings and diagrams. From the preface "There are several excellent textbooks on sound waves and their uses, but none that was at time of publication devoted solely to echo sounding at sea and to the intricacies of the equipment required for this purpose and it is thought that this book may, therefore, help to remedy this deficiency as much of the information contained herein has not been published before." ; Black & white photographs and diagrams; 8vo 8" - 9" tall; 299 pages. Very Good .

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