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Figure 15

Figure 15. Zacharias ethmophore plankton filter devised by Otto Zacharias in 1907. Top: view of the assembled apparatus. Bottom: internal speed reduction valve. This instrument was devised to collect plankton under adverse meteorolog ical conditions where normal net-towing operations became impossible. This inst rument was first used in a lake, but then in the Mediterranean and Tyrhennian.

Photo Category: Oceanography - Historical instruments

Author: D. Mille/Oceanographic Museum of Monaco/ NOAA

License: Public Domain Mark 1.0 (Public domain)
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Added On
18th October 2015
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