ClipArt ETC
"A, spectacles with bows hinged to the shoulders on the rims connected by the nose or bridge. B, spectacles with hook-bows and with bridge and shoulders riveted to the lenses. C, detail showing construction of shoulder. D, side view, showing rim. In all the figures: a, bows; b, shoulders; c, rims; d, bridge." —Whitney, 1889

A Collection of Spectacles

"A, spectacles with bows hinged to the shoulders on the rims connected by the nose or bridge. B, spectacles…