Figure 53. A bottom float for studying currents in closed basins of small extent 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.
Photo Category: Oceanography - Historical instruments
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| Added On | 18th October 2015 |
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