Gun

In its most general sense, a gun is a machine, having the general shape of a hollow cylinder closed at one end, and used for the purpose of projecting heavy bodies to great distances by means of gunpowder. Technically, it is a heavy cannon, distinguished by its great weight, length, and absence of a chamber. It is used for throwing projectiles with large charges of powder to long distances, with great accuracy and penetration. Guns came into use in the 14th century, and were first fired from supports, and in reality were artillery. Shortly after, they took the form of a clumsy hand-gun, called an arquebuse, which was portable, but discharged from a forked rest. The next modification, which came into use about the end of the 14th century, was called the matchlock. The piece was discharged by a lighted match brought down on the powder-pan by the action of a trigger. This was superseded in 1517 by the wheel-lock, the wheel upon flint or iron pyrites. Almost contemporary with this was the snaphance gun, in which sparks were generated by the concu ion of flint on the ribbed top of the powder-pan. About the middle of the 17th century the flint-lock began to be employed. This was a combination of the two latter weapons, but much superior to either. It continued universally in use until the early part of the present century, when the percu ion-lock was invented, which by 1840 (the time of its adoption by the British government), had completely superseded it. As the lock improved, and the rapidity of firing increased, the weight of the piece diminished; the old tripod first used as a rest gave way to one stake, and finally, in the 18th century, was abandoned altogether. The weapon was then the smooth-bore musket, which continued in use with various modifications until the middle of the 19th century, when it was partially superseded by the rifle. (See Small-arms .) In their earlier stages cannon went by various names, as bombards, culverins, petronels, and later on were reduced to the three denominations, technically, of guns, howitzers, and mortars. For the two latter, see Howitzer and Mortar . Guns are subdivided in the U. S. service according to their use, into field, siege, and sea-coast guns. The field-guns consist of two rifle pieces; the 3-inch rifle, adopted in 1861, and the 3 1 ⁄ 2 -inch rifle, adopted in 1870 (see Ordnance, Construction of ), and the Napoleon gun, a 12-pounder smooth-bore, adopted in 1857. (See Napoleon Gun .) The only siege gun adopted by the United States is a 4 1 ⁄ 2 -inch rifle. The 30-pounder Parrott, so extensively employed in our service for siege purposes, is not a regulation gun. The sea-coast guns consist of 13-, 15-, and 20-inch smooth-bores, and 10- and 12-inch rifles. An 8-inch rifle has been constructed by converting the 10-inch smooth-bore according to the Palliser or Parsons method. The 13-inch smooth-bore and the 10- and 12-inch rifles are regarded as experimental guns. The guns principally in use for the land and sea forces of the United States are those known as the Columbiad , or Rodman , Dahlgren , Gatling , Hotch ki , Napoleon , Parrott . (For particular descriptions, see appropriate headings.) In the British service they are the Armstrong , Palliser , Woolwich , or Fraser , and the Lancaster , Mackay , and Whit worth ; the three latter being now very little used. (See appropriate headings.) The only breech-loader in general use in Europe is the Krupp, which is largely employed for all purposes by Germany and Ru ia. See Krupp Gun .