Bi-focal spectacles after Benjamin Franklin's design
- Made:
- 1800-1820 in unknown place
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Science Museum Group
© The Board of Trustees of the Science Museum
Bi-focal spectacles after Franklin's design. The lower lens segment is for reading, the upper segment is for distance work. Early 19th century.
Details
- Category:
- Optics
- Object Number:
- 1921-323/183
- Measurements:
-
overall: 40 mm x 145 mm x 30 mm, , .01kg
- type:
- spectacles
- credit:
- Dunscombe collection of spectacles
