Object Details
- Description
- On one side this brass rule has an unnumbered scale of chords and architect's scales for making drawings at proportions of 1/5", 1/4", 1/3", 1/2", and 1" to the foot. The other side has 8" plotting scales with diagonal scales at each end. One plotting scale is divided to 1" and numbered by ones from 1 to 8, and the other is divided to 1/2" and numbered by ones from 1 to 16. A badly worn leather sleeve may not be original to the instrument. Compare to 1980.0676.01.
- The Smithsonian's Division of Ethnology received this rule in 1951 and believed it to be of American manufacture.
- Location
- Currently not on view
- Credit Line
- Gift of Dr. and Mrs. Arthur M. Greenwood
- 19th century
- ID Number
- MA.388991.02
- accession number
- 182022
- catalog number
- 388991
- Object Name
- scale, plotting
- scale rule
- Physical Description
- brass (overall material)
- leather (overall material)
- Measurements
- overall: .1 cm x 15.4 cm x 3.1 cm; 1/32 in x 6 1/16 in x 1 7/32 in
- place made
- United States
- See more items in
- Medicine and Science: Mathematics
- Science & Mathematics
- Scale Rules
- National Museum of American History
- Subject
- Mathematics
- Drafting, Engineering
- Record ID
- nmah_1214078
- GUID (Link to Original Record)
- https://n2t.net/ark:/65665/ng49ca746aa-9fe1-704b-e053-15f76fa0b4fa
