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![Figure 62 ship4438.jpg Figure 62](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_ship4438.jpg?itok=yRSQybjJ)
Description
Figure 62. Knudsen apparatus for the measurement of oxygen and nitrogen in seawater. This was a multiple use device that simultaneously was able to analyze sea water for the presence and amount of a number of gases. It was developedby the Dane Martin Knudsen and used by Ingolf in 1895 and 1896. (Image credit: Oceanographic Museum of Monaco | Y. Berard)