pl23_ship4060.jpg
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https://www.noaa.gov/media/digital-library-photo/pl23ship4060jpgDescription
Figure 53. A bottom float for studying currents in closed basins of smallextent used by the Copenhagen Hydrographic Laboratory.Left:float. Right: message. This float was first conceived by George P. Bidder with the aid of the Marine Biological Association of Plymouth, U. K., and first used from the HUXLEY in 1904 when 390 were launched in the North Sea.
Credit
Oceanographic Museum of Monaco
Photographer
D. Mille
Collection
Voyage to Inner Space
History of Oceanography Collection
The Early Instruments - Collections of the Oceanographic Museum at Monaco
Current Measuring Devices
Keywords
Oceanography
Historical instruments