One of eighty-six early incandescent lamps. Carbon
One of eighty-six early incandescent lamps. Carbon filament lamp, single loop filament (broken), no supports. Lead in wres held by glass bead then through seel clear pear-shaped bulb, with shoulder adjacent to base. Top pip. Siemens & Halske base (brass cylinder attached by plaster with connection to two "wings" sticking out fromplaster done at bottom). Siemens & Halske handwritten on base. No ratings given.
- Object Number:
- carbon filament lamp
- Institution of Electronical Engineering
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