✦ LIBER ✦

The Hydrographic Department

Book ID: 109401665
Publisher: Nature Publishing Group
Year: 1880
Tongue: English
Weight: 111 KB
Volume: 22
Category: Article
ISSN: 0028-0836
DOI: 10.1038/022086a0

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## With 3 figures. 1. Plankton Catcher. Though the disadvantages of nets for quantitative catches of planktic metazoa have long been agreed upon, they are still the only implements in general use. In freshwater and coastal waters the pump method is sometimes resorted to, but the inherent disadvant