Priming-tubes are small pipes having a cup on one end, and filled with a composition for firing cannon. The tube in general use in the U. S. service is the [friction-primer] (which see).
Slow-match is a slow-burning match prepared from hemp or flax slightly twisted, soaked in strong lye, or in water holding in solution sugar of lead. Cotton rope well twisted forms a good match without any preparation. Slow-match prepared from hemp or flax burns 4 to 5 inches to the hour; it is used principally for the purpose of retaining fire in the shape of a hard-pointed coal, to be used in firing cannon, fireworks, etc. It was formerly used in field-batteries for lighting the port-fires with which the pieces were discharged; but both are now entirely superseded by the friction-primer.
Quick-match is a match made of threads of cotton, or cotton-wick, steeped in gummed brandy or whisky, then soaked in a paste of meal powder and gummed spirits, and afterwards strewed over with meal powder; one yard of it burns in the open air 13 seconds. The quick-match is used to fire mortars, and sometimes in proving pieces. It is extensively used in priming all kinds of fireworks, such as fire and light balls, carcasses, rockets, priming-tubes, etc., and in conveying fire very rapidly from one portion of a piece of firework to another. When used for discharging cannon, the quick-match is set fire to by a slow-match, port-fire, or any other convenient material. When used to prime carcasses, etc., it is set on fire by the flame from the piece.
The Valenciennes composition is a compound of 50 parts of nitre, 28 of sulphur, 18 of antimony, and 6 of rosin; it is used as an incendiary composition, in charging shells for the purpose of increasing their destructive property, by setting fire to buildings, shipping, etc. For manufacture of ammunition for small-arms, see “U. S. Ordnance Memorandum,” No. 21, 1878.
Laborer (Fr.). In a military sense, expresses any direct and concentrated effort which is made to destroy a fortification. It likewise applies to the working of a bomb or shell, which excavates, plows up, and scatters the earth about wherever it bursts. Laborer un rampart, signifies to bring several pieces of ordnance discharged from two oblique directions to bear upon one centre. Shells are generally used on these occasions, and the chief design is to second the operations of the miner in some particular part from which the explosion is to take place.
Labuan Pulo. An island of the Malay Archipelago, lying off the northwest coast of Borneo. The British took possession of this island in 1846, and it was formally ceded to the British crown by the sultan of Borneo in 1848.
Lacandones. A tribe of Indians in Central America, who for more than three centuries maintained a hostile attitude to the Spaniards. They are nominally subject to Guatemala, but are in reality quite independent.
Lacay, or Laquet (Fr.). An old French militia was formerly so called. The name is found among the public documents which were kept by the treasurers belonging to the dukes of Brittany in the 15th century.
Lacerne (Fr.). The short woolen military cloak of the Romans.
Lacheté (Fr.). An opprobrious term which is frequently used among the French, and is applied in all instances of cowardice, want of spirit, or dishonorable conduct. La trahison est une lacheté; treason is infamous in its nature.