One of two photographs showing a transit instrument by Ertel and a mural circle made by Troughton and Simms
- Made:
- 1876 in Washington
One of two photographs showing a transit instrument by Ertel and a mural circle made by Troughton and Simms at the U.S. Naval Observatory, Washington.
Details
- Category:
- Astronomy
- Object Number:
- 1876-373/2
- Materials:
- paper
- type:
- photograph, mural circle and transit instrument
- credit:
- United States Naval Observatory
