Blinds

In military affairs, are wooden frames, composed of four pieces, either flat or round, two of which are 6 feet long, and the others 3 or 4 feet, which serve as spars to fasten the two first together: the longest are pointed at both ends, and the two others are fastened towards the extremities of the former, at about 10 or 12 inches. Their use is to fix them either upright, or in a vertical position against the sides of the trenches or sap, to sustain the earth. Their points at the bottom serve to fix them in the earth, and those at the top to hold the fascines that are placed upon them; so that the sap or trench is formed into a kind of covered gallery, to secure the troops from stones and grenades.