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ne, and presenting its chambers consecutively at the open rear of the barrel, which is common to all the chambers. The principle of construction is that of the revolving chambered pistol. (Hedrick, 1870.) See also fire-arms, where Puckle's Revolving Battery Gun, English Patent, 1718, is described and figured. 3. A number of parallel barrels arranged in rank, and having connected vents for intercommunication of fire. (Townsend, 1871.) The infernal machine of Fieschi, which he fired on Louis Philippe, was a row of barrels clinched to a frame, and had a train of powder which was laid over all the vents in succession, like the row of barrels in a proving-house. The Requa battery consists of 25 rifles, each 24 inches long, mounted in a horizontal plane upon a field-carriage. It is breech-loading, the cartridges being forced into the chambers by a sliding bar worked by two levers. By a lever beneath the frame the barrels may be diverged, so as to scatter the balls 120 yards in a dis
y the case or canister shot, discharged from cannon. These are contained in an envelope which is ruptured either by a bursting charge within or by the force of projection, and have consequently a tendency to scatter over a considerable area. The mitrailleur, or machine-gun, on the contrary, sends a large number of small projectiles independently, and with precision, to a considerable distance. French mitrailleur. The infernal machine with which Fieschi attempted to assassinate Louis Philippe in 1835, and succeeded in killing eighteen persons, including Marshal Mortier, and wounding a large number of others, besides severely injuring himself, was one of the earliest attempts with which we are acquainted for producing a simultaneous discharge from a number of gun-barrels. These were arranged side by side on a bench or stand, and fired by a train, much as in the mode of firing barrels in a proving-house. That first tried in the French service was made by removing part of th
e receives a twist to the left, is doubled, — that is, united with others, — and the combined threads are twisted to the right. Organizine is therefore double-twisted thrown-singles. Orgues. 1. (Fortification.) Timbers shod with iron so suspended as to be dropped upon an enemy passing through a breach or gateway. 2. An arrangement of a number of parallel musket-barrels, so placed as to be fired simultaneously by a train of powder. Such was the weapon of Fieschi who fired at Louis Philippe, and it may be held to be the predecessor of the mitrailleur (which see). O′ri-el. 1. The bow-window of English domestic architecture. Sometimes it is of two stories. Sometimes it does not reach the ground, but is supported by corbels. 2. A recess within a building, as a window-way, closet, or chamber. Ori-en-ta′tion. The placing with an eastern aspect or presentation. From Lat. oriens; Sc. sol, rising. (Surveying.) The determination of the east point in taking