Flat base with brass attachment which can be depressed to complete circuit. Two brass knobs at end. Used to complete electrical circuit.Some staining around fixed end of arm. Fittings can be seen from underneith base.
Asbestos Inspection - Non-Asbestos.
Documentation
- Waller, Augustus Desire, The Effect of Heat upon the Electrical State of Living Tissues., pp 303 - 309
