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Description
Figure 29. Marsh net devised by C. Dwight Marsh in 1893. Left: view of theapparatus before closing. Upper right: view of the closed mechanism. Lowerright: detail of the closing mechanism. This net was used for plankton sampling in lakes. It was first tested in Green Lake, Wisconsin, U. S. A., in 1893. (Image credit: Oceanographic Museum of Monaco | Left and)