Circular diffraction grating, 2-inch diameter ruled on glass, 165 lines per mm (4,200 per inch), unsilvered in passe-partout mount, made by W. R. Clark, London, England, 1910 -1915
- Object Number:
- furnishing and equipment
- tools & equipment
- optical instrument
- optical instrument component
- diffraction grating
- Clark, W. R.
- Permanent collection
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