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ROCKET

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Originally appearing in Volume V23, Page 434 of the 1911 Encyclopedia Britannica.
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ROCKET . (I) The name (Fr. coquette, See also:

Lat. eruca, a See also:kind of See also:cabbage) of two See also:species of See also:plants. The one, Eruca saliva, is a cruciferous See also:annual with See also:white See also:flowers veined with See also:purple; the leaves have a See also:sharp flavour and are used in See also:southern See also:Europe for salads. The other is a See also:hardy perennial herbaceous plant, of the genus Hesperis, of which Hesperis matronalis is the most See also:familiar species (see See also:HORTICULTURE). (2) A See also:cylinder of See also:paper, pasteboard or See also:metal, filled with an explosive mixture. This word, which appears in See also:mary forms in various See also:languages, is from the It. rocchetta, diminutive of rocca, a See also:distaff, the obsolete See also:English " See also:rock "; the application is due to a resemblance in shape. Rockets are used in pyrotechny for purpose of display, scattering showers of stars, coloured balls, &c., on bursting (see See also:FIREWORKS). They are also used in signalling, and especially as a See also:part of See also:life-saving apparatus for wrecks (see LIFEBOAT and LIFE-SAVING SERVICE). Large and heavy rockets, of which the See also:head formed a projectile, had too a considerable See also:vogue in the See also:early part of the 19th See also:century for See also:war purposes. They were invented by See also:Sir See also:William See also:Congreve (q.v.) and employed by him both afloat in See also:coast operations and in See also:field operations. Brought to the See also:notice of all armies by the fact that a rocket See also:battery of the Royal See also:Artillery served in the allied See also:army in the See also:Leipzig See also:campaign, war rockets were introduced in many armies, being sometimes issued as an additional portion of the equipment of See also:ordinary field batteries, sometimes reserved for See also:special rocket batteries. The Congreve rocket was in use in the See also:British army as See also:late as 186o.

There were four natures—3-pounder, 6-pounder, 12-pounder and 24-pounder. The See also:

case was of See also:sheet-See also:iron, on to which was screwed a cylindro-conoidal head forming the projectile. The head was made hollow and could be filled with a bursting See also:charge if a See also:shell effect was desired, a See also:base See also:fuze being provided. The iron case contained the rocket See also:composition, and was closed at the See also:rear end by a metal See also:plate with five holes or vents, and on the centre a See also:bush into which the stick was screwed. These rockets were fired from rocket tubes on tripods, the tubes being provided with a tangent sight. Against masses of troops within easy range, the war rocket was considered an efficient See also:engine; it was used also to set See also:fire to buildings, but was always deficient in accuracy. Eventually the Congreve rocket was superseded by the See also:Hale, of which two patterns were in use, the 9-pounder and the 24-pounder, for field and fortress warfare respectively. These had no sticks, and were centred by the arrangement of the vent, the gases, as they emerged from the vent, impinging upon a See also:screw-formed tail, to which they imparted the necessary rotation. These rockets were fired from a trough. The maximum effective range of the 9-pounder Hale rocket was about 1200 yards. The use of these engines was discontinued in the British service about 1885. On the See also:continent of Europe they had disappeared more than twenty years before.

See also:

Austria, the last See also:power to use them, See also:broke up her rocket batteries in 1867.

End of Article: ROCKET

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