562 



MARINE PRODUCTS OF COMMERCE 



Fig. 26-6. 



(.Courtesy U. S. Fish and ll'ildUfc Sci-jice) 

 Tongers working in southern waters. 



(.Courtesy U. S. Fish and iVildlijc So vice) 

 Fig. 26-7. Heavily loaded oyster dredger in South Carolina returning home. 



The scooper type of harvester, developed by J. Jurisich of Louisiana, consists 

 of a rakelike dredge with steel teeth. The dredge rests on runners, one on each 

 side, which prevent excessively deep digging. The gear is lowered to the bottom 

 by means of a strong cantilever mounted on a suitable stand on the deck of a 

 barge. An endless chain type of conveyor, with flexible loops made of steel cable, 

 is mounted on the cantilever in such a way that when the harvester is in operation 

 oysters and other material caught by the rake are scooped by flexible loops and 

 brought up on deck. The entire structure is so well balanced that the rake rests 

 very lightly on the bottom and the whole unit is easfly bounced if it runs into a 



