Nernst lamp
The Nernst lamp was an early form of incandescent lamp. == Construction == Nernst lamps did not use a glowing tungsten filament.
The Nernst lamp was an early form of incandescent lamp. == Construction == Nernst lamps did not use a glowing tungsten filament.
The Nernst lamp was an early form of incandescent lamp. == Construction == Nernst lamps did not use a glowing tungsten filament.
Source: Wikipedia "Nernst lamp" · CC BY-SA 4.0
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