（Ordnance.) A small mortar made light enough to be carried by hand, and adapted to throw a shell to a small distance.
Used in fortifications and for signaling.
The name is derived from its inventor, the Dutch Engineer officer, Coehorn, who was Director General of the fortifications of the United Provinces of Holland.
The regulation Coehorn mortar in the United States Service, is of brass, weighs 160 pounds, 24-pdr.
caliber. It is mounted on a wooden bed having four handleCoehorn mortar in the United States Service, is of brass, weighs 160 pounds, 24-pdr.
caliber. It is mounted on a wooden bed having four handles by which it is carried by as many men.
The English coehorn has a bore of 4 1/2 inches, a length of 12 inches, and weighs, with bed, about 340 pounds.
Goodwin's coehorn is fixed on a stake and fired by a trigger and lanyard.
It is a surprisingly effective little piece, throwing a three-inch shell to a great distance, and may be carried, one under each arm.
A coffee-pot with a bag to contain the ground coffee through which the boiling water is pour<
percussion principle by the Rev. Mr. Forsythe, in 1807.
For varieties, see under the following heads: —
This article treats of breech-loading small-arms generally; magazine fire-arms, needle-guns, revol- vers, pistols, cannon, and battery-guns are also considered under their respective heads.
It was in 1430, says Biblius, that smallarms were contrived by the
pted to receive and discharge a missile which is projected by a charge of powder, gun-cotton, or air, as the case may be. See under the following heads: —
Allied are another class not usually termed guns.
The projectiles are numerous.
Lists may be found under weapons; projectiles; fire-arms; artillery (which see).
Gun-barrels of superior quality are known as stub, stub-twist, wire-twist, Damascustwist, stub-Damascus.
Stub-iron consists of horseshoe nails, cleaned in a tumbling-box, mixed with from 12 to 50 per cent of steel pieces of the same size; puddled, hammered, heated, tilted, and rolled.
From this material a skelp is made.
Twist barrels are made of a ri
ir minor axes of the same diameter as the bore of the mortar.
The 13-inch sea-coast mortar (a) weighs 17,000 pounds, and its shell about 200 pounds.
The 10-inch light mortar (b) weighs about one ton, and throws a shell of 88 pounds.
The Coehorn (c) weighs 165 pounds, and its shell 24 pounds.
The length of bore of mortars seldom exceeds two or three calibers, and is often much less.
They are intended for firing shells at high angles of elevation, generally 45°, the crushing and expld States service is of brass, 24-pounder caliber, and weighs about 160 pounds. It is mounted on a wooden bed, having four handles at its sides, by which it can be readily carried by four men. It derives its name from the celebrated Dutch engineer officer Coehorn, to whom the invention is attributed.
In some European services much smaller mortars than these are recognized, weighing no more than 15 1/2 pounds, and attached to a stock.
A small mortar of this kind was invented b