Part of Fisheries Section Fish Commission Exhibit at the Coumbian Exposition, Chicago, 1893 On the Platform are Various types of dredges and rakes used in the oyster, clam and other molluscan fisheries. In the central tier are wicker and slat traps *Subject: World's Columbian Exhibition (1893 : Chicago, Illinois)--Fish Commission Exhibit, Fisheries--Exhibitions *Geographic Subject: United States--Illinois--Chicago *Tag: Expositions