TRY-WORKS. Large copper boilers, for boiling the blubber in whalers.
TUB, Grog. A half-cask, set apart for mixing the daily allowance of spirit with water, lime-juice, and sugar, prior to its being served out to the ship's company.
TUB, Match. A conical tub used to guard the slow match in action. They were formerly about five-gallon capacity, the head being sunk about two inches, and four holes bored to insert slow matches. They are now almost disused, except to keep a light ready for signal purposes, as rockets, blue lights, &c., by night.
TUBES. See [Chain-pump].
TUBES, for Guns. A kind of portable priming, for insertion into the vent,—of various patterns. (See [Friction-tube], [Quill-tubes], &c.)
TUBS, Topsail-halliard. Circular framed racks in which the topsail-halliards are coiled clear for running, and are prevented from fouling by being sent adrift in a gale.
TUBULAR BOILERS. Those in which the flame and hot gases, after leaving the furnaces, pass through a great number of small iron or brass tubes surrounded by water, by which means these gases are made to impart some of their heat to the water before they escape; thus fuel is economized.
TUCK. The after-part of a ship, immediately under the stern or counter, where the ends of the bottom planks are collected and terminate by the tuck-rail. Thus the fir frigates of 1812-14 had flat, square transoms similar to boats, or heart-shaped. Hence our square-tucked frigates, brigs, &c.
TUG. A vessel for towing in and out of harbours and the like. (See [Steam-tug].)
TUG, To [from the Anglo-Saxon teogan, to pull]. It now signifies to hang on the oars, and get but little or nothing ahead.