7 x 
CONSTRUCTION. 
Oa thefe fet off 56 toifer, from C to G, and 2 to H, 
anks 
thin. 
of the flanks of the counter-gua 
joins the ends of thefe fanks, cecouines the infide of t 
cenailles 
The ditch before the counter-guards is" 12 toifes broad 
at the faliant angles, and its counterfearp is drawn towards 
the oppofite fhoulders, in the fame manner as in his frf 
method. 
The capital of the ravelinis 45 toifes, and its faces, when 
produced, terminate on thofe of the counter-guards, about 10 
toifes from the fhoulders. -Ten toifes, however, are cut off 
from the faces of the ravelin, for the flanks which are parallel 
to its capital. 
The ditch before aes ravelin is 10 ie -broad, the 
ing to the plan of New Brifach, is applied to an oGtagon, of 
which the exterior fide is equal to 180 toifes, and is made 
ter-guards are each of them equal to 60 toifes. 
are found by fetting off 22 toifes, in ao defcribed from the 
oppofite fhoulders, as centres, and with the diftance between 
as raditis. A right line drawn cies the extremities. of 
_ the: Se ps to the exterior fide, to meet the 
fet off each-way for their demi-gorges, the pofitions of their 
flanks, which are perpendicular to the faid line, will be deter« 
mined. For each of thefe flanks, five toifes are . off out~ 
wards, and four from the faid line. And t e joining 
te infide = the flanks at the end of four oe ies 
the tower: 
The ditch is fix toifes broad before the faliant angles of 
the towers, and its counterfcarp meets the line joining x thefe 
angles, within ea toifes of the extremities of the flanks of 
the counter-guar 
e ve at ditch before the Eounte-ends is 15 toifes 
road, and its counterfcarp is parallel to the faces, The * 
capital of the ravelin is 55 toifes in length, and that of the 
redoubt within it, is equal to 23 toifes. The faces of the 
fi 
flanks, tk are. fale to its capital. The ditch before 
the ravelin is twelye toifes a and that before the re- 
doubt is fix. ‘The covert-way a 
his fecond method. € 
in ain,. ne are not in vie 
The parapets of his counter-guards, on both fides. 
of the faliant ape for the diftance - about twenty. feet, 
are raifed four feet higher than the reft, to pence thefe 
works from being anneyed by Beadle tattene 
In Mr. Vauban’s firft method of military cole uétions 
ot interfeéts the capitals of the counter-guards, will b _ of arms, as pu » (fr he never 
_ ties of the towers 5 from which peints, if feven ae ite oi any thing ‘imtlf relpetig it. 
TABLE for the Conftrudion. 
Forts. | Little Fortification. | Mean. | Great. }. 
Side of Figure, sor} Fd: J. be) yee tae 6 66:\ 60 
Polygon Solgo| 100 | 110 | 120] 130 | 140 | 150 | 160 | 170] 180} 190. 2 
{Perpendiculars.”  jrofr1] 125] 14°] 15 | 16 | 20421 | 23 | 25 | 30 | 311 25-| 22 
Faces of Baftions.. 22125| 28 | 30 | 33 | 35 4 40 | 42 48 | 47 | 50 | 53 | 55.| $0 
Capitals of Ravelins. 25428] 30:| 354 38 | 40.445} 50150] 52] 55 | 55 60 | 50 
And the following: fe is an ichnographical table of the Toifes, 
oo &es of the works a ca the body of the 
place, &c. ‘f Its ekg ue the onl of the 
3 
aoe Thicknefs of its epee in ~ face : 
: Thicknels of the rampart at its and flank at the bafe, 7 
- OF th Bo d f »  hafe TI _ OF. the Tenaille < Thicknels . te =e of i oo curs 
: “y or . Thicknefs of the parapet at its tain at t 5 
the Plas “¥ tafe . 
{The breadth “of the ditch & 
Thicknefs 0 of i. parapet, at the 
A hale. 
. Thicknels 
