A treatise containing the elementary part of fortification. [With] M. Belidor's new method of mining1756 |
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Oblíbené pasáže
Strana 229 - Gorge, of any work, is that part next to the body of the place, where there is no rampart or parapet; that is, at the counterfcarp of the ditch.
Strana 8 - But this is no derogation to their truth and certainty; no more than it is to the truth or certainty of the three angles of a triangle being equal to two right ones, because it is not so evident as, " The whole is bigger than a part," nor so apt to be assented to at first hearing.
Strana 220 - It is most commonly situated within the bastion, and made much in the same form. Sometimes the cavaliers are placed in the gorges, or on the middle of the curtain ; they are then made in the form of a horse-shoe. Their use is to command all the adjacent works and surrounding country.
Strana 227 - Flank (retired) is that which is made behind the line, which joins the extremity of the face and the curtain, towards the capital of the baftion.
Strana 50 - ... 5, gives 7 for the wall above; and as this wall is 20 feet high, the fifth of which is 4, and 4 added to the thickness 7 above, gives 1 1 for the thickness near the foundation.
Strana 170 - ... amongft them ; and if there is any danger of an enemy's approach by land, high ramparts and edifices muft be built, fo as to cover them. When a river is pretty large, and it is not convenient for making a harbour without great expence, the...
Strana 38 - ... to the points b, c, will be the faces of the places of arms. If lines are drawn, parallel to the lines which terminate the covert-way, and the places of arms, at 20...
Strana 34 - The fecond fort defend the ditch much better than the firft, and add a low flank to thofe of the baftions ; but as thefe flanks are liable to be enfiladed, they have not been much put in practice. This defect might however be remedied, by making them fo, as to be covered by the extremities of the parapets of the oppofite ravelins, or by fome other work.
Strana 234 - ... the perpendicular bars being spiked, both to wound the assailants, and fix themselves in the ground. The portcullis is one of the distinctions of the royal house of Tudor.
Strana 36 - ... are only 20 toifes. > Thefe. kind of works may make a good defence, and -are no very great expence ; for as they are fo...