Wellcome exposure calculator
- Object Number:
- 1990-5036/440/1
- type:
- exposure calculator
Wellcome exposure calculator and diary for 1924. Published by Burroughs Wellcome & Co., London. Disc form exposure calculator with 45 pages of instructions and tables. 70 pages of general photographic information and 95 page diary and negative index. In wallet. Pencil missing.