Browsing named entities in Knight's Mechanical Encyclopedia (ed. Knight). You can also browse the collection for Rook or search for Rook in all documents.

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eaming machines. Roof-staging. Roof-stag′ing. A scaffold for resting upon a slanting roof while shingling, slating, repairing, or painting. The barbed rod is thrust up beneath a course of shingles, and the barbs hold in the course both above and below. The claw-plate holds to the top of the roof, and serves, with the barbed rod, to hold the plank to which the bracket is hinged and braced. Roof-truss. The framework of a roof, consisting of thrust and tie pieces. See roof. Rook′er. (Bakery.) A tool like the letter L, used for withdrawing ashes from the oven. Room. (Mining.) The worked space in a mine, especially of a coal-mine, where the roof is supported by regular pillars. The whole winning is thus said to be worked with pillar and room, or post and stall, — the same thing. Thirlings are worked spaces connecting rooms, and the cutting of the thirlings changes a wall to a row of pillars. Room and space staff. (Shipbuilding.) A long measu