Outlines of Dredge. Upper Figure, Front View; a, a, 



Blades for Scraping up Material from Bottom with 



Perforations for Attaching Sack; c, c, Cross 



Bars; b, b, Arms; d, Rings to which 



Dredging Rope is Attached 



Lower Figure, Side View; a, a, Scraping Blades; c, Bar 



Fastened to Ends of Blades; b, b, Arms; d, 



Ring; e, Rope; f, Outline of Sack 



