DOUBLING. (_See_ RANK.) Putting two ranks into one. DOUBLING A CAPE. In navigation, is to sail round or pass beyond it, so that the point of land separates the ship from her former situation. DOUBLING-NAILS. The nails commonly used in doubling. DOUBLING UPON. In a naval engagement, the act of inclosing any part of a hostile fleet between two fires, as Nelson did at the Nile. The van or rear of one fleet, taking advantage of the wind or other circumstances, runs round the van or rear of the enemy, who will thereby be exposed to great danger and confusion. DOUBLOON. A Spanish gold coin, value 16 dollars: £3, 3_s._ to £3, 6_s._ English. DOUGH-BOYS. Hard dumplings boiled in salt water. A corruption of _dough-balls_. DOUSE, TO. To lower or slacken down suddenly; expressed of a sail in a squall of wind, an extended hawser, &c. Douse the glim, your colours, &c., to knock down. DOUT, TO. To put out a light; to extinguish; _do out_. Shakspeare makes the dauphin of France say in "King Henry V.:"-- "That their hot blood may spin in English eyes, And dout them." DOUTER, OR DOUSER. An extinguisher. D'OUTRE MER. From beyond the sea. DOVER COURT BEETLE. A heavy mallet. There is an old proverb: "A Dover court; all speakers and no hearers." "A Dover court beetle, and wedges with steel, Strong lever to raise up the block from the wheel."--_Tusser._ DOVE-TAIL. The fastening or letting in of one timber into another by a dove-tailed end and score, so that they hold firmly together, and cannot come asunder endwise. The operation of cutting the mortise is called dove-tailing. DOVE-TAIL PLATES. Metal plates resembling dove-tails in form, let into the heel of the stern-post and the keel, to bind them together; and also those used for connecting the stem-foot with the fore end of the keel. DOWAL. A coak of metal in a sheave. DOWBREK. A northern term for the fish also called spärling or smelt. DOWEL. A cylindrical piece of hard wood about three inches in diameter, and the same in length, used as an additional security in scarphing two pieces of timber together. Dowels are also used to secure the joinings of the felloes, or circumferential parts of wheels; and by coopers in joining together the contiguous boards forming the heads of casks.--_Dowel_, or _dowel-bit_, is the tool used to cut the holes for the dowels. DOWELLING. The method of uniting the butts of the frame-timbers together with a cylindrical piece or tenon let in at each end. DOWN ALL CHESTS! The order to get all the officers' and seamen's chests down below from off the gun-decks when clearing the ship for an engagement. DOWN ALL HAMMOCKS! The order for all the sailors to carry their hammocks down, and hang them up in their respective berths in readiness to go to bed, or to lessen top-weight and resistance to wind in chase. DOWN ALONG. Sailing coastways down Channel.