W. Duane Hope with Microscope, 1975, Smithsonian Archives - History Div, In his office in the northwest corner of the Natural History Building, W. Duane Hope of the Department of Invertebrate Zoology, National Museum of Natural History, sits at a high-powered microscope which he uses to examine slides of marine nematode worms. On the table are slides in a slide holder tray, photos of worm body parts, a slide holder box, petri dish, bottles and tools. His research focused on the systematics, comparative and functional ultrastructure, and phylogenetics of marine nematode worms. Through the window can be seen a portion of the National Museum of History and Technology, now the National Museum of American History, and a portion of the Herbert C. Hoover Building,headquarters for the United States Department of Commerce..