Diffraction grating area 5 cm by 4.5 cm on 8 cm by 7.5 cm (a

Diffraction grating area 5 cm by 4.5 cm on 8 cm by 7.5 cm (approx) block of speculum metal, mounted in a blackened brass cell with slide-off glass cover and levelling feet, made by (or for) Lord Blythswood [Archibald Campbell Campbell], with "Blythswood, May 26, 1905, 24953 lines cut, H.[?]S.A." scratched on speculum surface

Collection

Science Museum

Inventory Number

3158311

Title

Diffraction grating area 5 cm by 4.5 cm on 8 cm by 7.5 cm (a

Object Type

PhysicalObject

Measurements

- 130 mm