Object Details
- Albree, G. Norman
- Description
- This is Norman Albree's pilot model for a two-sided circular logarithmic chart. The side labeled A has a double logarithmic scale arranged in a spiral of seven turns. Its outer edge is marked from 1 to 3.15. The inner edge is marked from .0 to .5. The side labeled B also has a spiral double logarithmic scale, marked from .315 to 1 on the outer edge and from .5 to 1 on the inner edge. A clear plastic cursor folds over the edge of the instrument and is pivoted at the center on both sides.
- The A side is marked inside the fourth spiral: 19©45, and at the center: TRULOG DUPLEX. The B side is marked inside the fourth spiral: 19©45 (/) G. N. Albree, and at the center: G. NORMAN ALBREE. The instrument was received with a hand-sewn brown leather pouch. George Norman Albree, the inventor and donor, was an aeronautical engineer. See also MA.335484 and MA.335486.
- Location
- Currently not on view
- Credit Line
- Gift of G. Norman Albree
- after 1945
- ID Number
- MA.335487
- catalog number
- 335487
- accession number
- 321674
- Object Name
- slide rule
- Physical Description
- paper (part material)
- plastic (cursor material)
- wood (overall material)
- metal (part material)
- Measurements
- overall: 1.5 cm x 26.2 cm x 24.5 cm; 19/32 in x 10 5/16 in x 9 21/32 in
- place made
- United States: Massachusetts, Boston
- See more items in
- Medicine and Science: Mathematics
- Science & Mathematics
- Slide Rules
- National Museum of American History
- Subject
- Rule, Calculating
- Chart, Logarithmic
- Mathematics
- Record ID
- nmah_1215052
- GUID (Link to Original Record)
- https://n2t.net/ark:/65665/ng49ca746aa-8eb1-704b-e053-15f76fa0b4fa
