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Description
Figure 19. Closing device for Chun and Petersen net first devised by GiuseppePalumbo, commanding officer of the VETTOR PISANI. In the course of its aroundthe world oceanographic cruise of 1882-1885, the idea to develop a helical closing device for a towed plankton net was developed. Prince Albert I of Monacoadapted this idea to a vertical net during the expedition of 1887. (Image credit: Oceanographic Museum of Monaco | D. Mille)