The field engineer of M. le Chevalier de Clairac; tr. from the French, with observations and remarks on each chapter. Together with the addition of ... to explain the author's constructions

 
9781231142202: The field engineer of M. le Chevalier de Clairac; tr. from the French, with observations and remarks on each chapter. Together with the addition of ... to explain the author's constructions

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1773 Excerpt: ...with pallisades, or wells sunk in the ground. V. What Folard proposes in his excellent commentaries on Polybius, may give an idea of a quite different construction to the preceding i, tho' the intent of the author was only to strengthen his fortifications by an augmentation of works. It must be observed, "fays he, above all things to make advanced redouts, or arrows, at every 30 or 40 fathoms, and their com munications should be between 2 banks or parapets, well pallisaded on all sides, and so, that 4 men may march a'breast, or in front, between the 2 banquets." It could be wished, that so learned an author had entered into a greater detail on this subject, or at least given a plan of his scheme; all that can be concluded from thence with certainty is, that he supposes lines with redans traced in the common method; from thence we may judge of the advantages and disadvantages of his scheme. We must then suppose a lunette advanced 30 or 40 fathoms before the curtain of 1 of pjate Xx' these fronts; for it is before the curtain he " places them: what is the consequence? That all, or nearly all the fire of the adjacent flanks, enfilades the gorge, or fires obliquely on the faces. I suppose, that this distance of 30 or 40 fathoms is taken from the gorge, and not from the flanked angle of the work, or else the lunette, scarcely projecting beyond the saliant angles, would not have the intended use. With regard to the usual method, if redans are so obtuse, that the lunettes may be defend-. xx ed and not battered, from whence are these S 2" yedans and the curtain to be flanked? It is true, the communications fire upon the whole faces of the adjacent redans, in either cafe; and if such 4 works are made before all the fronts, the rest of...

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