Open Triangle
date: label: date made
content: ca 1900
notes: label: Description
content: This 8" 30°-60°-90° triangle with an open interior is made of two different kinds of mahogany, with a section of reddish wood set between two sections of darker wood. A small triangle is etched in the short leg. On the back, the object has a sticker marked: 839. Compare to 335329, 335330, and 1977.1101.89.
label: Description
content: James W. Queen of Philadelphia sold a similar ebony or maple triangle with a mahogany inlay, but not in an 8" 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 839 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: 1977.1101.0090
label: catalog number
content: 1977.1101.0090
label: accession number
content: 1977.1101
objectType: label: Object Name
content: triangle
physicalDescription: label: Physical Description
content: mahogany (overall material)
label: Measurements
content: overall: 20.4 cm x 11.8 cm x .3 cm; 8 1/32 in x 4 21/32 in x 1/8 in