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Figure 69. Buchanan sounding apparatus and water bottle. This instrument wasdevised by John Buchanan for the simultaneous collection of a bottom sedimentsample and a water sample at the bottom. Schematic drawing from: Murray, J.and Reynard, A. F., 1891. Report on the scientific results of H. M. S. Challenger... Deep-sea deposits, pp. 1-32. Figure 7. (Image credit: Oceanographic Museum of Monaco)