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Figure 67. Pelometer for the rapid sorting of sediments in water. ProfessorJulien Thoulet used this device on board research ships to rapidly determine the nature of seafloor sediments. It would allow quick classification into asingle category such as mud, sandy silt, or muddy sand for entry into a stationlog. Thoulet used the pelometer described by Bouquet de la Gyre. (Image credit: Oceanographic Museum of Monaco | Y. Berard)