Sweet’s indexed catalogue of building construction for the year 1906 (1906)
New York : Chicago : Architectural Record · leaf 284
Fig. 4. MOBILE VENTIL.VTION DEVICES MOUNTED DIRECTLY IN THE GL.VSS Fig. 5. MOBILE VENTILATION DEVICESINSTALLED IN WALL OF A BUILDING PATENTS. sash {i. e., windows less than 36 inches wide, one hood; windows 37 to 58 inches wide,two hoods; windows 59 to 76 inches wide, three hoods, etc.). These…
Building materials
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