ans of a roller against the side of the window casing, | correspond to it, and the swivel-piece, F, is constructed for the intermediate standard self-acting fire damper. The damper, which the pressure of the roller being graduated by dispensed with. the ledger heing held in its poles of a piece of… … shell formed with spiral ledges, which re- tion. Heretofore we have had quite a num- duce the meat toa finely subdivided state, ber of calls for such presents, and we have always had good accounts afterwards of | vided with rods and fitting within the inner the same time into the membrane tube, of…
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![An illustration from Current architecture: published in connection with a joint exibition [sic] held in Boston November 1916 (1916)](https://img.insideoutlibrary.com/img/200/ia-currentarchitect1916bost-104-162.webp)