Water bottle reversing
Water bottle reversing a water bottle specially designed for use in deep sea waters the bottle is lowered by wire and can be closed watertight at any desired depth, by means of a messenger allowed to slide down the wire and strike the reversing mechanism making the bottle turn upside down thus the enclosed water sample is not contaminated by water at higher levels or lost by leakage after the bottle is brought on board reversing thermometers are attached to reversing water bottles see ekman bottle and nansen
Source: http://www.iho.int/iho_pubs/standard/S-32/S-32-eng.pdf
Web site to visit: http://www.iho.int/
Author of the text: INTERNATIONAL HYDROGRAPHIC ORGANIZATION
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