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![Figure 17 ship4144.jpg Figure 17](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_ship4144.jpg?itok=TB5VDUws)
Description
Figure 17. Challenger model of the Buchanan bottle, devised by the chemist ofthe expedition, John Buchanan, to sample intermediary layer waters. Left:descending. Middle: closing. Right: ascending. This type of bottle was usedduring the course of the voyage, from 1872 to 1876. (Image credit: Oceanographic Museum of Monaco | Y. Berard)