细节
A 19th-Century kaleidoscopic demonstration lantern slide,
with rotating glass plates, in mahogany frame -- 7 1/8in. (18cm.) wide; and an amethyst-tint x-ray tube etched with a trademark of three scales within a G and numbered 5998, on turned wood stand -- 7½in. (19cm.) wide (2)
with rotating glass plates, in mahogany frame -- 7 1/8in. (18cm.) wide; and an amethyst-tint x-ray tube etched with a trademark of three scales within a G and numbered 5998, on turned wood stand -- 7½in. (19cm.) wide (2)