Object Details
- Darling, Brown & Sharpe
- Description
- This steel 45°-45°-90° triangle is 8" tall and has an open interior. A hole near one vertex is for hanging. The instrument is marked: Darling, Brown & Sharpe (/) Providence, R.I. The firm operated under that name from 1866 to 1892. (Compare to 1977.0460.08 and 1977.0460.09.) It advertised this triangle in 1868 for $4.50 and for $4.00 in 1887 and 1899 (when the company was known as Brown & Sharpe). In 1884 the Physical Laboratory of the University of California in Berkeley purchased a triangle of this type from Darling, Brown & Sharpe for $4.25.
- Erasmus Darwin Leavitt Jr. (1836–1916), the renowned American mechanical engineer and designer of steam engines, owned this triangle. It was donated to the Smithsonian by his granddaughter.
- References: Kenneth L. Cope, intro., A Brown & Sharpe Catalogue Collection, 1868 to 1899 (Mendham, N.J.: The Astragal Press, 1997), 14, 118, 157; "Disbursements," in Annual Report of the Secretary to the Board of Regents of the University of California, for the Year Ending June 30, 1884 (Sacramento, 1884), 50.
- Location
- Currently not on view
- Credit Line
- Gift of Margaret van D. Rice
- 1866-1892
- ID Number
- 1977.0460.10
- catalog number
- 336081
- accession number
- 1977.0460
- Object Name
- triangle
- Physical Description
- steel (overall material)
- Measurements
- overall: 20.4 cm x 20.4 cm x 3/16 in; 8 1/32 in x 8 1/32 in x .508 cm
- place made
- United States: Rhode Island, Providence
- See more items in
- Medicine and Science: Mathematics
- Squares and Triangles
- Science & Mathematics
- National Museum of American History
- Subject
- Mathematics
- Drafting, Engineering
- Drawing Instruments
- Record ID
- nmah_904235
- GUID (Link to Original Record)
- https://n2t.net/ark:/65665/ng49ca746a7-6903-704b-e053-15f76fa0b4fa
