An Elementary Course of Permanent Fortification; For the Use of the Cadets of the U.S. Military Academy

An Elementary Course of Permanent Fortification; For the Use of the Cadets of the U.S. Military Academy

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1874 edition. Excerpt: ...of the side or front to be flanked. The outline of their plan is mostly that of a lunette, PI. 3, Fig. 36, the flanks being perpendicular to the line; of the scarp, and the two faces making a salient angle of 60. The caponniere is either built in juxtaposition with the enceinte, or else detached from it. In the latter case an inclosure is formed between the two by a loop-holed wall which connects the flanks with the scarp wall. Each flank consists of one or two tiers of arched chambers, the piers of the arches being perpendicular to the back of the walls of the flank. Each chamber is of sufficient dimensions for the service of a single gun with a contracted field of fire. (PI. 3, Figs. 36, 37.) In some cases loop-holes are pierced for small-arms on each side of the embrasure; in others the casemates of one story are pierced for cannon, and the other for small-arms. The casemates are closed in rear by a thin wall, which is provided with windows for light and ventilation; and the piers are pierced with doorways to form a communication between the chambers and to assist the ventilation. Flues or vents, Fig. 37, are made in the front wall, just under the arches, for a like purpose. Where it may be necessary the lower floor is drained by a conduit through the front wall. An open court is left between the flanks, and each flank is covered at top with from 4 to 6 feet of earth. The flanks are separated from the faces by a closed corridor which serves as a communication. In front of the corridor and on each side of the axis of the caponniere, a casemated chamber, which is open in front, is arranged for one mortar, Figs. 36, 38. The arches of these chambers rise towards the front the better to subserve the object in view. On one side of the...show more

Product details

  • Paperback | 78 pages
  • 189 x 246 x 4mm | 154g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236739833
  • 9781236739834