The Encyclopaedia Britannica; A Dictionary of Arts, Sciences, and General Literature, with New Maps and Original American Articles by Eminent Writers Volume 9

The Encyclopaedia Britannica; A Dictionary of Arts, Sciences, and General Literature, with New Maps and Original American Articles by Eminent Writers Volume 9

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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. 1895 edition. Excerpt: ...from the inner esearp of which' it" is separated bya passage. The counterscarp of the bastion; is carried continuously along the inner edge of the mask; whilst in front of it is a ditch which separatesit fl'0!Il.1.demi-caponniere forming its eounterscarp and covered-way; and a glacis sloping down the ravelin of the ditch.-The mask, the lunette redoubt in the ravelin, and the redoubt in the re-entering place of arms fonn a_ combined series of works of great efficiency for defence, which completely cover all but the salient portion of the face of the bastion. The flank of the bastion, as before observed, forms an angle' of S0 with the" line of defence, and the advantage taken_of this in the citadel of Ghent in forining'a most powerful intrenchment in the bastion, with a curtain as long as that of" the main front, has also been pointed out. General Haxo, one of the ablcst engineersof"rnodern times, did not publish his scheme of defence, nor did he reproduce it as a whole in the works he constriicted. doubt iless considering, as has been so frequently urged, that-systems, so-called, can only be looked upon as the exhibi-tion of great principles, not as rigid rules for their applica-tion. His ravelin is made very prominent, and the salient-is formed into a traverse, or mask, casemated and armed with artillery. Within the ravelin there is a redoubt, and within that a pasemated caponniere or bastionette. The ditch of the ravelin is closed by continuing the counterscarp across it with a glacis slope into the ravelin ditch, and by this arrangement the ditch of the redouht in the riivelin is also closed. The cnunterguards, the higher and the lower bastions, form almost three lines of defence, ..."show more

Product details

  • Paperback | 1076 pages
  • 189 x 246 x 54mm | 1,878g
  • Rarebooksclub.com
  • United States
  • English
  • Illustrations, black and white
  • 123675431X
  • 9781236754318