Browse Items (3436 total)

copper coloured tube with screw holes at one end.

Cylindrical brass weight with the number "11" engraved.

Brass collimator with spring shutter on one end.

Set of 24 brass slides with different sized apertures cut from them and painted black. In grooves in a wooden block.

cylinder with screw hole on top of wooden base with groove for running along optical bench.

Searchlight case on tripod stand. The mirror formerly within is stored separately. This device was used in the 1960s by the Natural Philosophy Radio Astronnomy group as the base for a 2 m diameter, 9 mm wavelength, steerable radio reception dish. …

Rectangular mirror in wooden frame curving inwards. Brass plate on back with engraving on it.

Wooden beam with two sliding lenses on it, assumed for use with part a of set. One lens is in a brass frame. Set up as a telescope arrangement

A brass stand with a large circular metal lens holder attached. Lens included.

Telescopic level, all brass on adjusting table with 4 screwed feet. Is this the item in the 1823 inventory ' leveling instrument, Miller Edinburgh pounds 6.16.6 ' (C501?).