Warnerke's Standard Sensitometer
Darkslide containing step wedge with 21 steps. Phosphorescent plate made luminous by burning magnesium and placed in holder. Plated exposed through wedge under luminous plate for 30 seconds. No.79. L.Warnerke.
- Measurements:
-
overall: 165 mm x 118 mm x 32 mm,
- Materials:
- glass and wood (unidentified)
- Object Number:
- 1990-5036/3184/2
- type:
- sensitometer
