Apparatus diagrams for a light actuated microphone and a pick up for a gramophone
- Date:
- Jul-Aug 1928
- Reference:
- PP/NHE/A/4/12/1
- Part of:
- Heatley, Norman George, OBE (1911- 2004)
- Archives and manuscripts
Collection contents
About this work
Description
Coloured line drawings, initialled and dated by 'NGH' (Heatley), of a pick-up for gramophone and a light-actuated microphone (with manuscript notes at the bottom by Heatley).
Publication/Creation
Jul-Aug 1928
Physical description
1 file
Where to find it
Location Status Access Closed stores