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![Figure 20 ship4477.jpg Figure 20](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_ship4477.jpg?itok=Gyy8-GrF)
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Figure 20. A model devised to demonstrate the quantity of common salt in thesea. The idea is that if all the salt in the sea were to evaporate it wouldcover an area and volume equal to the above sea-level area and volume ofAfrica. Dr. Walter Stahlberg conceived this idea as a means to communicate tothe public amount of salt in the sea. (Image credit: Oceanographic Museum of Monaco | Y. Berard)