Collection of biconvex and plano-convex lenses
 Catalogue Number: 3228 Collection of biconvex and plano-convex lenses Category: Spectacles and lenses Sub-Category: Spectacle lenses Year Of Publication/Manufacture: c 1900 Time Period: 1900 to 1939 Description Of Item: Six edged biconvex lenses of assorted powers, four oval shaped, two round and two uncut plano-convex lenses, one with focal length labelled in dioptres and inches. Powers range from +1.50 to +4.25 Historical Significance: Edged lenses were available for immediate fitting to specific frames, the uncut ones would allow selection of any frame and the lenses to be cut to shape. How Acquired: Donated by Wayne Lyons Optical dispenser, Malvern Optical Clinic Date Acquired: 26/11/2016 Condition: Good. two lenses have small chips. Location: Archive office. East wall shelves unit 3. Drawer 8 |