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Description
Figure 10. Buchanan mercury piezometer - the second type of piezometer made byJohn Buchanan during the CHALLENGER Expedition. Like the preceding model, thistype had thermometers which remained open to the hydrostatic pressure of the sea at the depth deployed. Buchanan credited Aime with this idea and used thisinstrument to study the compressibility of mercury. (Image credit: Oceanographic Museum of Monaco | Y. Berard)