PROFILE, OR SECTION OF VAUBAN’S FIRST SYSTEM.
Construction.
The interior slope of the rampart has a base of 18 feet, and a perpendicular height of 17 feet 6 inches.
The terreplein has a breadth of 25½ feet, its height being 18 feet sloping to 17 feet 6 inches, the height of the interior slope.
The banquette is 3 feet in height, the tread 4 feet wide, and the slope 5 feet wide.
The parapet is 4 feet 6 inches higher than the banquette, its interior slope is 18 inches, its thickness 18 feet, and its superior slope has a declivity of 3 feet; the revetment is 3 feet thick.
The escarp has a perpendicular height of 36 feet, measuring from the cordon to the bottom of the ditch.
The tablette, or coping-stone, at the top of the revetment, has a projection of 6 inches square.
The cordon is semicircular, its radius being 6 inches.