Photometric gauge by Adam Hilger and Wilson
Photometric gauge by Adam Hilger and Wilson, London, NW1, England, c. 1874-1904.
- Object Number:
- 1919-489/1
Wilson photometric gauge, with switch board
Photometric gauge by Adam Hilger and Wilson, London, NW1, England, c. 1874-1904.
Glass slide of the Wilson Photometric gauge