Air, Light and Efficiency Showing Influence of Sash Types and Building Design . A Pond A-frame interior. American BrassCo., Bridgeport, Conn. hy cooperation of architects and sash makers. 25 AIR, LIGHT A X D EFFICIENCY. Making cushions and trim In Willys-Overland factory. Pond A-franies between thenvo lines of columns give added light and air. Counterbalanced sash is used in nearly all the buildings, thusen:,uring: equal top and bottom openings for air. By making the

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