Part 242

There are 5 holes of 3-quarters of an inch diameter, and 3 inches deep, made with a drift of that size in the top of the composition while it is warm: one in the centre, and the other four at equal distances round the sides of the barrel. When the composition is cold and hard, the barrel is primed by well driving those holes full of fuze composition, to within an inch of the top; then fixing in each hole a strand of quick-match twice doubled, and in the centre hole two strands the whole length; all which must be well driven in with mealed powder: then lay the quick-match all within the barrel, and cover the top of it with a dipt curtain, fastened on with a hoop to slip over the head, and nailed on.

Bavins, for a fire-ship, are made of birch, heath, or other sort of brushwood, that is both tough and quickly fired: in length 2.5, or 3 feet; the bush-ends all laid one way, and the other ends tied with two bands each. They are dipped, and sprinkled with sulphur, the same as reeds, with this difference, that the bush ends, only, are dipped, and should be a little closed together by hand, as soon as done, to keep them more compact, in order to give a stronger fire, and to preserve the branches from breaking in shifting and handling them. Their composition is, rosin 120lb., coarse sulphur 90, pitch 60, tallow 6, and mealed powder 12, with some fine sulphur for salting.

Iron-chambers, for a fire-ship, are 10 inches long, and 3.5. in diameter; breeched against a piece of wood fixed across the holes. When loaded, they are almost filled full of corned powder, with a wooden tompion well driven into their muzzles. They are primed with a small piece of quick-match thrust through their vents into the powder, with a part of it hanging out; and when the ship is fired, they blow open the ports, which either fall downwards, or are carried away, and so give vent to the fire out of the sides of the ship.

Curtains, for a fire-ship, are made of barras, about 3-quarters of a yard wide, and 1 yard in length: when they are dipped, 2 men, with each a fork, must run the prongs through the corner of the curtain at the same end; then dip them into a large kettle of composition (which is the same as the composition for bavins) well melted; and when well dipped, and the curtain extended to its full breadth, whip it between 2 sticks of about 5.5 feet long, and 1-5 inches square, held close by 2 other men to take off the superfluous composition hanging to it; then immediately sprinkle saw-dust on both sides to prevent it from sticking, and the curtain is finished.

Reeds, for a fire-ship, are made up in small bundles of about 12 inches in circumference, cut even at both ends, and tied with two bands each: the longest sort are 4 feet, and the shortest 2.5; which are all the lengths that are used. One part of them are single dipped, only at one end; the rest are double-dipped, i. e. at both ends. In dipping, they must be put about 7 or 8 inches deep into a copper kettle of melted composition (the same as that for bavins;) and when they have drained a little over it, to carry off the superfluous composition, sprinkle them over a tanned hide with pulverised sulphur, at some distance from the copper.

STORES for a FIRE-SHIP of 150 tons.

No. Fire-barrels 8 Iron chambers 12 Priming composition barrels 3¹⁄₂ Quick-match barrels 1 Curtains dipped 30 Long reeds single dipped 150 Short reeds{double dipped 75 {single dipped 75 Bavins single dipped 209

Quantity of COMPOSITION for preparing the stores of a FIRE-SHIP.

For 8 barrels, corned powder 960lb. pitch 480lb. tallow 80.

For 3 barrels of priming composition, salt-petre 175lb. sulphur 140lb. corned powder 350lb. rosin 21lb. oil-pots 11.

For curtains, bavins, reeds, and sulphur to salt them, sulphur 200lb. pitch 350lb. rosin 175lb. tallow 50lb. tar 25lb.

Total weight of the composition 3017 pounds, equal to C. 26 : 3 : 21.

Composition allowed for the reeds and barrels, 1-fifth of the whole of the last article, which is equal to 160lb. making in the whole 3177 pounds, or C. 28 : 1 : 13.

Port-fires in artillery, may be made of any length: however, they are seldom made more than 21 inches. The interior diameter of port-fire moulds should be ¹⁰⁄₁₆ of an inch, and the diameter of the whole port-fire about ¹⁄₂ an inch. The paper cases must be rolled wet with paste, and one end folded down. They are used instead of matches to fire artillery. The composition of wet port-fire is, salt-petre 6, sulphur 2, and mealed powder 1; when it is well mixed and sieved, it is to be moistened with a little linseed oil: the composition for dry port-fire is, salt-petre 4, sulphur 1, mealed powder 2, and antimony 1.

Rockets, in pyrotechny, an artificial firework, consisting of a cylindrical case of paper, filled with a composition of certain combustible ingredients; which being tied to a stick, mounts into the air to a considerable height and there bursts: they are frequently used as signals in war time.

Composition for sky-rockets in general is, salt-petre 4lb. brimstone 1lb. and charcoal 1¹⁄₂lb; but for large sky-rockets, salt-petre 4lb. mealed powder 1lb. and brimstone 1lb. for rockets of a middling size, salt-petre 3lb. sulphur 2lb. mealed powder 1lb. and charcoal 1lb.

Quick-match in artillery, is of 2 sorts, cotton and worsted; the first is generally made of such cotton as is put in candles, of several sizes, from 1 to six threads thick, according to the pipes it is designed for. The ingredients are, cotton 1 lb. 12 oz. salt-petre 1 lb. 8 oz. spirits of wine 2 quarts, water 2 quarts, isinglass 3 gills, and mealed powder 10lb. It is then taken out hot, and laid in a trough where some mealed powder, moistened with spirits of wine, is thoroughly wrought into the cotton. This done, they are taken out separately, and drawn through mealed powder, and hung upon a line to dry.--The composition for the second is, worsted 10oz. mealed powder 10lb. spirits of wine 3 pints, and white-wine vinegar 3 pints.

LABORER, Fr. literally, to remove earth with a plough, spade; &c. Figuratively, to belabor, which according to Johnston, is to beat, thump, &c. The French use it, in a military sense, to express any direct and concentrated effort which is made to destroy a fortification.

LABORER un rampart, signifies to bring several pieces of ordnance discharged from two oblique directions to bear upon one centre. Shells and hollow balls are generally used on these occasions, and the chief design is to second the operations of the miner in some particular part from whence the explosion is to take place.

Laborer likewise applies to the working of a bomb or shell, which excavates, ploughs up, and scatters the earth about wherever it bursts.

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 Britanny, in the fifteenth century.

LACE, the uniform of regiments is distinguishable often by the lace and button.

LACERNA, Fr. a garment which was worn by the ancients. It was made of woollen stuff, and was only worn by men; originally indeed by those alone that were of a military profession. It was usually thrown over the toga, and sometimes indeed over the tunica. It may not improperly be considered as the surtout or great coat of the ancients, with this difference, that there was a winter lacernum and a summer one.

The lacerna was adopted by the Romans towards the close of their republic. Even as late down as the days of Cicero it was unknown amongst them, or if known, censured as a mark of disgraceful effeminacy. During the civil wars that occurred in the triumvirate of Augustus, Lepidus, and Antony, the lacerna became familiar to the people, and by degrees was adopted as common apparel, by the senators and knights of Rome, until the reigns of Gratian, Valentinian, and Theodosius, who enjoined the senators not to wear it.

The lacerna is the same as the chlamys and the burrbus.

Un LACHE, Fr. A familiar phrase among the french to signify a coward, &c.

LACHER, Fr. to go off. Son pistolet, ou son fusil, vint à lâcher; his pistol, or his musquet, went off of itself.

LACHER pied, Fr. to run away.