- Item type
- Object
- Makers
- Thorp
- Provenance
- Via Dr Bowen, 30 October 1970
- Primary inscriptions
- "Thorp's Transparent Replica of Roland' / Metal Diffraction Grating / 14502. lines to the inch"
- Other inscriptions
- Handwritten, in black ink, paper label "DIFFRACTION / GRATING / (Transmission)"
- Dimensions
- Height: 51mm Width: 63mm Depth: 4mm
- Inventory No
- 34599
Description
Diffraction transmission grating, in yellow tin box, with handwritten identifier.
.1 - Diffraction transmission grating. Glass sheet with diffraction to the centre. Paper adhesive label to glass with inscription.
.2 - Tin box with hinged lid for diffraction transmission grating. Painted yellow outside. Base lined with cotton wool. Handwritten white adhesive label to lid face. Inscription to underside of base. Previously a Lysantol Pastille tin.
