Browse Items (3436 total)

tin cylindrical float terminating in a cone hat has a ring for attaching additional weight. A rod protrudes from the top, terminating in a circular tray. Possibly an early hydrometer

Brass disc with wooden disc screwed to one side with wooden rod attached; pieces of copper leaf attached to end of rod

Piece of thick fibre optical cable with sheath and casing (not visible to naked eye). Light enters one end and exits out the other having been reflected within the cable

Patchboard 1.5 mm pins with translucent yellow casings. Contained in small plastic bag.

2 large cupboard with 22 drawers in each. Inside there is an assortment of lenses, lens holders, foils, mirrors and crystals.

marked as crystal samples

a hand blown cylindrical glass laboratory jar with rimmed top and base.

Brass aperture selector and 2 brass rings. Aperture selector is basically a small cylinder with a circular disk, with 8 holes in it, offset on top.

3 anamorphic drawings on circular sheets of paper. Small hole in centre of sheets:
1) black and white drawing of 8-pointed star with radii
2) similar too above but on different paper
3) geometric design, black and white with grey and green shading

glass dome with brass neck piece and screw hole, possible for suspending an apparatus inside or attaching a tube.
Used as storage cover for friction wheels, ABDNP200255