- Item type
- Object
- Primary inscriptions
- "Hurter & Driffield's Actinograph. Patent No.5545. 1888."
- Other inscriptions
- on instruction booklet "INSTRUCTIONS FOR THE USE OF HURTER & DRIFFIELD'S ACTINOGRAPH (PATENTED) ENTERED AT STATIONER'S HALL, LONDON, MARION & CO, 1891"
- Object type
- Slide rule
- Inventory No
- 89337
Description
Two actinographs or slide rule exposure calculators built into their cases, each with an instruction booklet and one with a box
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