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Description
Figure 45. Jacobsen and Paulsen apparatus for the measurement of plankton ina water sample. Devised by Jacob Peter Jacobsen of the Danish HydrographicLaboratory and Doctor Ove Paulsen, of the Botanical Museum of theUniversity of Copenhagen, in 1910. This instrument was easier to use and lesssubject to operator error than the preceding model. (Image credit: Oceanographic Museum of Monaco | P. Roggero)