Oyster culture. Rehabilitation of oyster beds in Mississippi and Louisiana, report to accompany H. R. 3505 [authorizing appropriation for investigating and rehabilitating oyster beds damaged or destroyed by intrusion of fresh water and blockage of natural passages west of Mississippi River in vicinity of Lake Mechant and Bayou Severin, Terrebonne Parish, La., and by opening of Bonnet Carre spillway]; submitted by Mr. Tollefson.