'Spherometre' a type of sperometer used to measure the convex and concave shape of spectacle ophthalmic lenses, signed 'G. L.', French, 1900-1920. Dial scale graduated in dioptres (dioptrice) & inches (pouce) and marked as patented (Brevete S.G.D.G.).
Details
- Category:
- Optics
- Object Number:
- 1952-317
- Materials:
- metal plated (unknown), glass and paper (fibre product)
- Measurements:
-
overall (upright): 108 mm x 63 mm x 40 mm, .177kg
- type:
- spherometer
- credit:
- Clay, R.S.
