Browse Items (3473 total)

Atomic model made of wooden balls (green and gold) and metal rods; pastic label attached reads "Flurorspar Ca.7 2, Scale 2.5 CMS=1 A"; illustrating organisation of atoms in the solid.

Farnell OR module in ABDNP:201911a

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.

3.5 inch floppy disk with paper label which reads, 'Elonex MS-DOS 3.30' and 'S/N: 017624' maker: Microsoft 1988; read only switch in lower left corner. Accompanied by paper envelope with clear plastic window and licence agreement printed on back

stainless steel instrument used for measuring the surface texture. In leather pouch.

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.

Brass stand with engraving on the base. Similar to ABDNP200634a but without magnifier. Also has wooden plate round base.

Hand held brass telescope with sliding focus adjustment. Likely to be telescope from a spectrometer.