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 glass valve or cathode with model printed on the sticker. It is cylindrical with 8 pins from it's base and a large metal cylinder around the top. Part of a massive collection of valves in a cardboard box.
Wooden U frame with iron rod, 2 different sized (approx. 28 mm and 22 mm diameter) brass balls sliding on rod linked with string; (hardened) rubber end pads to cushion balls. Central post to fit Watkins & Hill 's whirling table. Embedded disc '…