Archive image from page 274 of The depths of the sea. The depths of the sea. An account of the general results of the dredging cruises of SS. Porcupine and Lightning during the summers of 1868, 1869 and 1870, under the scientific direction of Dr. Carpenter, , J. Gwyn Jeffreys, , and Dr. Wyville Thomson, depthsofseaaccou00tho Year: 1873 chap, v.] DEEP-SEA SOUNDING. 213 tions were soon made. Commander Dayman made Fig. 39.—Brooke's Deep-Sea Sounding Apparatus. several improvements for the sounding voyage of

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