Open Triangle
date: label: date made
content: ca 1900
notes: label: Description
content: This 12" 45°-45°-90° triangle with an open interior is made of three different woods, with two sections of lighter wood (0.5 cm wide) around two sections of darker wood (0.8 cm wide) around one section of reddish wood (1 cm wide). Three horizontal splines made from the lighter wood reinforce each corner. The back of the object has a sticker marked: 364.
label: Description
content: Neither Keuffel & Esser nor the Eugene Dietzgen Company advertised triangles like this one. James W. Queen of Philadelphia offered only two-toned triangles, of walnut or mahogany with a maple or ebony inlay. Additionally, the firm did not sell inlaid triangles in a 12-inch size. The previous owner of this instrument collected more than 1,200 hand tools and machine tools and displayed them at his family's building company in Baltimore, Md. This object was item number 364 in his collection.
label: Description
content: Reference: James W. Queen & Co., <i>Priced and Illustrated Catalogue of Mathematical Instruments</i> (Philadelphia, 1883), 51.
label: Location
content: Currently not on view
topic: label: Subject
content: Mathematics
label: Subject
content: Drawing Instruments
setName: label: See more items in
content: Medicine and Science: Mathematics
label: See more items in
content: Squares and Triangles
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content: Science & Mathematics
creditLine: label: Credit Line
content: The John R. Gerwig, Jr., Collection
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1977.1101.0087
label: catalog number
content: 1977.1101.0087
label: accession number
content: 1977.1101
objectType: label: Object Name
content: triangle
physicalDescription: label: Physical Description
content: pearwood (overall material)
label: Physical Description
content: mahogany (overall material)
label: Physical Description
content: walnut (overall material)
label: Measurements
content: overall: 30.5 cm x 30.5 cm x .3 cm; 12 in x 12 in x 1/8 in