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NOAA Photo Library Image - ship4080

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.

Image ID: ship4080, Voyage To Inner Space - Exploring the Seas With NOAA Collect
Photographer: D. Mille
Credit: Oceanographic Museum of Monaco

Category: Oceanography/Historical instruments/

High Resolution Photo Available

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November 10, 2017