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This object is not on display at the National Air and Space Museum. It is either on loan or in storage.
Object Details
Date 1887-1903 Country of Origin United States of America Type EQUIPMENT-Test Manufacturer Smithsonian Institution
 Physical Description Half an object which appears as a solid dome. There is evidence of cracking and two large grooves or gouges appear to run the length of the top, circumventing a center hole. The bottom: 1.0" outer rim is elevated with four holes and is 1/8" high. Bottom area is 3.5" wide and flat with four holes. The very center is 1.0" wide and flat and on a lower level with a 1/8" hole in the dead center of object. All this indicates that this piece is the female half of object which was probably held in place by pegs from the male half. Dimensions 3-D: 7.3 x 14cm (2 7/8 x 5 1/2 in.)
Storage: 18.73 x 18.42 x 9.53cm (7 3/8in. x 7 1/4in. x 3 3/4in.)
 Materials Wood
 Inventory Number A19820923000 Credit Line Transferred from the Smithsonian Institution to the United States National Museum. Data Source National Air and Space Museum Restrictions & Rights Usage conditions apply
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