SLINGING A MANOVERBOARD, in order to stop a leak in a ship, is managed thus. The man is trussed up about the middle in a piece of canvass, and a rope to keep him from sinking, with his arms at liberty, a mallet in one hand, and a plug, wrapped in oakum and well tarred in a tarpauling clout, in the other, which he is to beat with all dispatch into the hole or leak.