Browse Items (3436 total)

Used carbon filament lamp (16 cp?) with standard bayonet cap. Marked "BTH Edison". Conspicuous darkening of inside of bulb

four rods for stroking with fur to produce electrostatic charge. Materials differ and are probably not amber (Gr electrum). Wrapped in grey woven material

box, wooden frame with glass front and back. Brass rod connects a gold leaf to a top touch disc. Copper leaf against one side connected to an external thumb nut contact. Silver foil lining.

grouped for convenience, four wooden plates of irregular shape. Holes are possibly for points of suspension in centre of gravity experiments. Different woods and various quality of finish

a test tube with rubber bung filled with grass stems, possibly spills for burning to detect presence of gasses

a cylindrical glass laboratory jar with rimmed top and base

glass dome with bell shape and open neck sealed with cork. Suspended from a thread is a cardboard sling, possible for suspending a magnetised needle

Cat skin, cream, ginger, brown and black markings on fur; one patch on rear side, used for electro statics. Used in lecture demonstrations for generating charge by rubbing

a brass balance arm with marking 1 to 12 on each arm and grade marks every half unit. A metal pointer is fixed to the upper edge of the balance centre; part of a weighing balance mechanism

a hollow cylinder of brass with a cross bar forming a long armed 'T'. There is a pin hole at each end of the 'T' bar. The cylinder has a decorative knob on one end, the other end being open and slightly serrated as if for cutting