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![Figure 71 ship4448.jpg Figure 71](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_ship4448.jpg?itok=Pz8WeDff)
Description
Figure 71. A Mohr-Westphal density balance. This instrument was first described in 1832 by the German chemist Carl Friedrich Mohr. It is a balance with twoarms, where the equilibrium is reached by adding weight on a tray. This type of instrument was modified by G. Westphal who replaced the tray with an adjustable counterweight. Julien Thoulet used this type of instrument in his studies. (Image credit: Oceanographic Museum of Monaco | Y. Berard)