Profile gauge with concave profile
1844-1845
Two profile gauges
- maker:
- William Parsons
Two profile gauges, concave and convex which were used by the 3rd Earl of Rosse to measure the 72 inch mirrors used on the largest Rosse telescope.
Details
- Category:
- Astronomy
- Object Number:
- 1914-372
- Materials:
- iron
- Measurements:
-
overall: 50 x 2000 x 100 mm
- type:
- optical testing instruments and gauges (mirror)
- credit:
- Lord Rosse (5th Earl)
