56. Dark Slide Carrier with Focussing Screen used with Reflecting Telescope, c. 1854
Simple box with ground glass focusing screen and long brass barrel for wet-collodion glass plates 65 x 76 mm, used with Warren De la Rue's reflecting telescope, but attached to the viewing tube and not mounted across the tube of the telescope, in contrast to Items 54 and 55.
Length 147 mm, width 90 mm, height 105 mm.
Inventory no. 63,460.