One of eighty-six early incandescent lamps. "Twis

One of eighty-six early incandescent lamps. "Twisted arch" filament. Bulky cement joint to lead in, wires in pinched internal stem filled with plaster of paris. Clear bulb, top pip, no cap, wires broken at surface of plaster of paris pronounced "belly" in stem. 40 on stuck-on paper label. Candlepower?

Details

Category:
Lighting
Object Number:
1923-173/63
type:
carbon filament lamp
credit:
Institution of Electronical Engineering
status:
Permanent collection

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