U.S. National Museum Attic Storage in the West Wing, by Unknown, c. 1911, Smithsonian Archives - History Div, United States National Museum, now the National Museum of Natural History, attic storage in the west wing. Visible is the false ceiling of Sackett board, intermediate truss members, and arrangement of storage cases and shelves. The cases are steel covered and the shelves entirely of metal. Some of the cases are open to show how artifacts are stored. The windows on the left are in the walls of the light well between the skylight and the ceiling light (from USNM Bulletin 80)..