Bu. U.S. B. F., 1917-18. PLATE XOOX, 
Fic. 1.—The dredge ready to be lowered into the water, Black River, Ark. (See p. 57.) 
Fic. 2.—The dredge resting on gunwales of two boats forming the catamaran from which it is operated, (See p. 57.) 
