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The hand mortar is a firearm that was used in the late 17th century and 18th century to throw fused grenades. The action was similar to a flintlock, matchlock, or wheellock firearm (depending on the date of production), but the barrel was short, usually less than 2 inches (5 cm) to 4 inches (10 cm) long (though some are reported to have barrels up to 13 inches (33 cm) long), and had a large bore to accommodate the grenade; usually between 2 and 2.5 inches (5 to 6 cm).〔Claude Blair, Pollards History of Firearms Ed. 1983, pp 56-58, 92〕 ==Usage== After priming the firearm and adding the gunpowder, the shooter would light a grenade fuse, place the grenade in the muzzle of the mortar, then fire it at the enemy. However, accidents could occur if the weapon misfired and the lit grenade remained in the barrel. Additional modifications attempted to light the grenade using the burning gunpowder, but accounts say that the fuse would be forced into the grenade which would explode immediately.〔(【引用サイトリンク】title=handmortar )〕 A lack of surviving specimens of this firearm indicate that it was not a popular weapon, possibly due to the safety issues. In his essay on the weapon, Hewitt opines that the mortar is among a variety of "projects for destruction which have never destroyed anything but the fortunes of their inventors."〔 pp. 218-23〕 In fact, under military exhibitions in '' The Official Report of the Calcutta International Exhibition, 1883-84 '' a hand mortar is described as "only a toy ... never intended for service." Hand Mortars were also to be found in the New World. References to a hand mortar being transferred in Maryland are found in the record of ''The Proceedings of the Council of Maryland'' in 1698. Another account in the journal of Alexander Henry the younger tells of a hand mortar (called a cohorn; after Menno van Coehoorn) being loaded with a pound of powder, 30 balls, and fired in an action against Sioux indians in 1808. Another reference to the use of cohorns in the New World can be found in The Life of Joseph Brant (Thayendanegea) including the Border Wars of the American Revolution by William L. Stone (two volumes) published Albany NY 1865. Stone in describing Sir William Johnson's Niagara campaign of 1759 notes the following: "The youthful warrior likewise accompanied Sir William during the Niagara Campaign of 1759, and in the brilliant achievements of the Baronet, after the chief command had devolved upon him upon the death of General Prideaux, is said to have acquitted himself with distinguished bravery. General Prideaux, commanding the expedition, was killed by the accidental explosion of a cohorn on the 20th of July..." (Stone, Vol 1, p. 20).〔The Life of Joseph Brant (Thayendanegea) including the Border Wars of the American Revolution by William L. Stone (two volumes)published Albany NY 1865 and scanned by the Google Book Search Project from a copy in the Stanford University Library Collection〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Hand mortar」の詳細全文を読む スポンサード リンク
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