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![Figure 18 ship4473.jpg Figure 18](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_ship4473.jpg?itok=Lb23nRwl)
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Figure 18. Crates of bottles for water samples designated to study dissolvedoxygen. The upper crate contains 15 bottles while the lower crate contains 24.Such crates have been used to store bottles with ground glass stoppersfor dissolved oxygen samples since the beginning of the Twentieth Century. (Image credit: Oceanographic Museum of Monaco | Y. Berard)