SET OF SIX DIDACTIC LENSES
ENGLAND, LATE 19TH CENTURY
the fitted wooden case with padded protection for the lenses, each lens with label: biconvex, planconvex, conavconvex, biconcav, planoconcav, convexconcav
7¾in. (19.5cm.) wide in case
SET OF SIX DIDACTIC LENSES
ENGLAND, LATE 19TH CENTURY
the fitted wooden case with padded protection for the lenses, each lens with label: biconvex, planconvex, conavconvex, biconcav, planoconcav, convexconcav
7¾in. (19.5cm.) wide in case
.jpg?maxwidth=3840)