Maker's Name: 
Adam Hilger Ltd., London
Where made: 
58 × 24 × 21 cm

Wooden casing,; brass arm (containing lens), turn screws and clamps. Photographic plate housing wooden with brass turn screws fro adjusting plate position. Stiff paper and cloth concertina tunnel connecting photographic plate housing to wooden casing and brass arm.Also shutter for exposure. Used with 052 - Constant Deviation Spectrometer to obtain photograph of the viewed spectrum. Able to be shifted laterally so as to view the entire spectrum and also vertically to place one spectrum set above another on the same plate. Can fit up to 4 sets per plate.