Edwin A. Battison with De Dondi Clock; Freeze Dry Specimens, , Smithsonian Institution Archives, Edwin A. Battison, Associate Curator of the Division of Mechanical and Civil Engineering at the Museum of History and Technology, now known as the National Museum of American History, poses with a replica of the 14th century De Dondi clock; Fernando Cabral of the Museum of Alvaro de Castro, El Marques, Mozambique, a visiting exhibits intern, examines freeze-dry specimens with Museum of Natural History exhibits specialist Robert Winckelman..