Browse Items (3473 total)

1 electrically tapped coherer on stand. Coherer is reset by electrically operated tapper. Glass tube replaced after breakage, c. 1990.

Brass binocular eyepiece for using with microscope or telescope.

a metal switch on a plastic base. The switch has 3 layers to it and 5 terminals which are quite small

Small metal, painted black, circular screen with groove in base and screw to tighten it around an optical bench.

Oval glass in woodchip block. Used to be a mirror but the silver has almost gone. Used to be fixed on to something, glue is still in triangular shapes on the base.

Spherical pendulum bob with pointer. Support attachment made in 1993.

Wooden frame holding a piece of paper. Paper marked with burnt patches; possibly used to show illumination of a candle. Has wire handle, possibly broken off of something.

rectangular mirror in metal frame with brass 'joint' at back allowing it to be angled

Light bulb with very thin filament wire stretched vertically 4 four times. No markings. Screw fitting.

Set of 12 large negatives on a roll.