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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 This object is really four pieces in one. The top piece has "No. 4" written on it. It is a half circle with two flat pieces on each side. This is ONE piece. When this piece is removed, a center piece in two parts is revealed. There is a top and bottom, in semi-circled fashion. When these piecs are removed, what's left is the bottom base. Written on the base is: "No. 4." The center is the cradle in which the two individual center pieces rest on. The bottom basd has a shape which compliments the part to the top: a half circle with two flat pieces on each side. This is also ONE piece. But it rests on a base stand for stability. Dimensions 3-D: 20.2 x 7.5 x 10.5cm (7 15/16 x 2 15/16 x 4 1/8 in.)
Storage: 27.31 x 13.97 x 12.7cm (10 3/4in. x 5 1/2in. x 5in.)
 Materials Wood
Paint
Varnish
Iron Alloy
 Inventory Number A19820950000 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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