A Philosophical and Mathematical Dictionary, Vol. 2 of 2: Containing an Explanation of the Terms, and an Account of the Several Subjects, Comprised ... Natural and Experimental (Classic Reprint) - Softcover

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Excerpt from A Philosophical and Mathematical Dictionary, Vol. 2 of 2: Containing an Explanation of the Terms, and an Account of the Several Subjects, Comprised Under the Heads Mathematics, Astronomy, and Philosophy Both Natural and Experimental

Artillery M aunties. Or the m sinew a field battery, is made about 25 or 30 yards behind the battery, towards the parallels, and at least 3 feet under ground, to te ceive the powder, loaded shells, 'port-tires. Ore - its roof and sides should be well secured with boards, to prevent the earth from falling in: it has a door, and a double trench or passage sunk from the magazine to the battery. The one to enter, and the other to go out at. To prevent con fusion. Sometimes traverses are made in the passages, to prevent ricochet shot from entering the magazine.

Founder-m at; same, is the place where powder is ltept in large quantities. Authors ditier very much with regard to the situation and construction of these magazines; but all agree, that they ought to be arched and bomb-proof. Ln fortifications. They were formerly placed in the ram part'; but of late they have been built in different parts of the town. The first powder-magazines were made with Gothic arches: but M. Vauban thinking these too weak, constructed, them of a semicircular form, the dimensions being 50 feet long within, and 25 feet broad; the inunda tionsnre 8 or 9 feet thick. And 8 feet high from the foun dation to the spring ofthe arch also the floor 2 feet from the ground, to preserve it from the damp.

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