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Figure 41. Richard bottle, helical model invented by Doctor Jules Richard in1902. The helical system eliminated the need for a messenger system forinverting the bottle at the desired depth. This type of bottle was used on thePRINCESSE ALICE II in 1902 at a depth of 1870 meters in the Mediterranean Sea.Left: descending. Right: ascending. (Image credit: Oceanographic Museum of Monaco | Y. Berard)