One of eighty-six early incandescent lamps. Arch
One of eighty-six early incandescent lamps. Arch filament, quiet stiff. No filament supports. Filament cemented into platinium (?) tubes crimped over leading - in wires passing through a short single stem. Round bulb, with short neck fitting into flared glass tube and attached by plaster (now loose) wires brought out to brass strips bent up side of glass tube. Top pip, no base, Manufacturer unknown, no rating given.
- Object Number:
- carbon filament lamp
- Institution of Electronical Engineering
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