The third sort of ditch has all the advantages of the other two kinds; if, as we have just observed, it can be so contrived, as to admit water occasionally into the different basons by means of aqueducts, and be drained, as circumstances may require.
Draw-bridge. See [Bridge].
Embrasures. See [Embrasure].
Envelope, is a work of earth raised occasionally in the ditch, sometimes like a plain parapet, at others like a small rampart with a parapet to it. Envelopes are generally made before weak places.
Epaulement. See [Epaulement].
Epaule, or the shoulder of the bastion, the angle made by the union of the face and flank.
Escarp. See [Scarp].
Esplanade. See [Esplanade].
Exterior side of a fortification, is the distance, or imaginary line drawn from one point of the bastion to that of the next.
Faces of the bastion. See [Bastion].