| BANQUETTE. | PARAPET. | DITCH. | |||||||||||||||
| Interior slope. | Superior slope. | Exterior slope. | |||||||||||||||
| A | B | C | D | F | D | E | D | E | D | E | F | G | H | I | J | K | F |
| 1 | 6 | 5 | 3 | 24 | 7½ | 1½ | 7½ | 15 | 5½ | 5½ | 120½ | 3 | 26 | 3 | 3 | 6 | 138 |
| 2 | 6 | 4 | 3 | 21 | 7½ | 1½ | 7½ | 15 | 5 | 5 | 113⅞ | 3 | 20 | 4 | 4 | 8 | 128 |
| 3 | 6 | 5 | 3 | 24 | 7½ | 1½ | 7½ | 12 | 5½ | 5½ | 101 | 3 | 23 | 3 | 3 | 6 | 120 |
| 4 | 6 | 4 | 3 | 21 | 7½ | 1½ | 7½ | 12 | 5 | 5 | 98⅜ | 3 | 17 | 4 | 4 | 8 | 104 |
| 5 | 6 | 4 | 3 | 21 | 7½ | 1½ | 7½ | 9 | 5½ | 5½ | 81½ | 3 | 19 | 3 | 3 | 6 | 96 |
| 6 | 6 | 4 | 3 | 21 | 7½ | 1½ | 7½ | 9 | 5½ | 5½ | 81½ | 3 | 16 | 4 | 4 | 8 | 96 |
| 7 | 5 | 4 | 3 | 19½ | 7½ | 1½ | 7½ | 6 | 6 | 6 | 66⅜ | 2 | 18 | 3 | 3 | 6 | 90 |
| 8 | 5 | 4 | 3 | 19½ | 6 | 1 | 6 | 6 | 4½ | 4½ | 44 6 8 | 2 | 15 | 10 | 5 | 8 | 60 |
| 9 | 8 | 1½ | 8 | 12 | 5½ | 5½ | 102⅛ | 3 | 19 | 3 | 3 | 6 | 96 | ||||
| 10 | 7½ | 1 | 7½ | 9 | 5½ | 5½ | 78 | 2 | 16 | 4 | 4 | 6 | 72 | ||||
| 11 | 6 | 1 | 6 | 6 | 4½ | 4½ | 44⅝ | 2 | 12 | 4 | 3 | 6 | 51 | ||||
| 12 | 6 | 1 | 6 | 3 | 5¼ | 5¼ | 33 15 16 | 2 | 9 | 6 | 3 | 8 | 36 | ||||
| 13 | 4 | 4 | 3 | 18 | 7½ | 1 | 7½ | 4 | 5½ | 5½ | 44¾ | 2 | 15 | 10 | 5 | 8 | 60 |
SIMPLE METHODS OF TRACING FIELD WORKS, ON THE GROUND.
1. Square redoubt.
Place pickets in a line (in length conformable to the side of the intended work), at each end of which erect perpendiculars equal in length to the side first marked out, and join the termination of these lines; which will complete the perimeter of the redoubt.
Note.—A perpendicular is raised on a given line, with a chain or cord, by forming a right-angled triangle from the numbers 3, 4, and 5, or any multiples thereof, and extending the cord, &c., so that the base may correspond with the base line of the pickets, and the perpendicular be in the direction of the side required.—Vide [Practical Geometry].
2. Pentagonal redoubt.
With a chain, tape, or cord, construct, and lay down with pickets five similar, and contiguous triangles, having their bases, which form the sides of the pentagon, in the proportion of 47 to the other two equal sides, the length of each of these being 40.
3. Hexagonal redoubt.
From a central point with a chain, or line, construct, and lay down with pickets six equilateral, and contiguous triangles, the bases of which will form the required hexagon.