Synchronous mirror unit for Duddell's oscillograph
Synchronous mirror unit for Duddell's oscillograph
- Object Number:
- 1918-2 Pt1
- type:
- mirrors
Duddell's double oscillograph
Synchronous mirror unit for Duddell's oscillograph
Baseboard with projection lantern, two lenses, limelight apparatus, arc lamp, resistances, mirror, switches etc. for Duddell's oscillograph