Nine inch mirror of speculum metal (exact diam" 8 15/16 in) in tin cell with close fitting cover 9 1/2" diam
- maker:
- William Herschel
Nine inch mirror of speculum metal (exact diam" 8 15/16 in) in tin cell with close fitting cover 9 1/2" diam, 1 1/2" deep, focal length 10' 1", cell and cover each painted " J"
Details
- Category:
- Astronomy
- Object Number:
- 1925-464
- Materials:
- speculum metal and tin
- credit:
- Mr John Herschel-Shorland
