MORNING SESSION Thursday, 5 November 1992 at 10.30am. OPTICAL TOYS AND PERSISTENCE OF VISION DEVICES
A late-eighteenth century mahogany-body camera obscura with a pair of brass handles, contemporary 8½ x 13 inch mirrror and a brass 'eyeball' optic in a brass mount - 11 x 14 x 11½ inches.

細節
A late-eighteenth century mahogany-body camera obscura with a pair of brass handles, contemporary 8½ x 13 inch mirrror and a brass 'eyeball' optic in a brass mount - 11 x 14 x 11½ inches.