Wheatstone type photometer, in brass box, six cork discs with silvered beads, 1870
Wheatstone type photometer, in brass box, six cork discs with silvered beads to give various curves, by William Ladd, London, England, 1870-1872.
- Measurements:
-
overall: 75 mm x x , 58 mm,
- Materials:
- metal (unknown) , copper (alloy) , brass (copper, zinc alloy) , steel (metal) , coated metal , glass , cork , bitumen and ivory
- Object Number:
- 1872-38 Pt1
- type:
- photometer
- Image ©
- The Board of Trustees of the Science Museum
