- 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.
- 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.
- Reference: James W. Queen & Co., Priced and Illustrated Catalogue of Mathematical Instruments (Philadelphia, 1883), 51.
- Currently not on view
- Object Name
- date made
- ca 1900
- Physical Description
- mahogany (overall material)
- overall: 20.4 cm x 11.8 cm x.3 cm; 8 1/32 in x 4 21/32 in x 1/8 in
- ID Number
- catalog number
- accession number
- Credit Line
- The John R. Gerwig, Jr., Collection
- Drawing Instruments
- See more items in
- Medicine and Science: Mathematics
- Squares and Triangles
- Science & Mathematics
- Data Source
- National Museum of American History
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