Surveyor's Vernier Compass
Surveyor's Vernier Compass
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- Description
- This surveyor's compass marked "Mahn & Co. St. Louis, Mo." dates from the period 1891-1906 when Herman Mahn was trading as such. It has a variation arc on the south arm that extends 24 degrees either way. The vernier is moved by a tangent screw on the south arm, and reads to 2 minutes. An outkeeper is on the south arm, and two level vials are on the north arm.
- Location
- Currently not on view
- Object Name
- Surveyor's Compass
- date made
- 1891-1906
- maker
- Mahn, Herman
- place made
- United States: Missouri, St. Louis
- Measurements
- overall length: 15 1/2 in; 39.37 cm
- needle: 5 1/8 in; 13.0175 cm
- overall in case: 4 7/8 in x 16 1/2 in x 7 5/8 in; 12.3825 cm x 41.91 cm x 19.3675 cm
- ID Number
- PH.333650
- catalog number
- 333650
- accession number
- 300659
- Credit Line
- University of Missouri at Columbia.
- See more items in
- Medicine and Science: Physical Sciences
- Surveying and Geodesy
- Measuring & Mapping
- Data Source
- National Museum of American History
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