Interclude

[W]hen the receiver FF is emptied of air, the ſtop-cock B is to be ſhut, that ſo all paſſage of external air into the receiver may be intercluded, […]

Next morning the combined forces appeared again in order of battle, in front of the Athenian works, and by their position intercluded the communication of the Athenian general with his fort of Labdalum, and with his northern lines.