photographic replica diffraction grating (6000 lines to one Paris inch)
- Made:
- 1888
photographic replica diffraction grating (6000 lines to one Paris inch), from an original grating by Norbert. Purchased at sale of late W. Lettsom, 1888.
Details
- Category:
- Optics
- Object Number:
- 1918-110
- Materials:
- paper (fibre product), cardboard and glass
- Measurements:
-
overall: 3.5 mm x x , 66 mm, .015kg
- credit:
- Court, Thomas Henry