X-ray
Geissler
Crookes
Radio
Box art
Dr. Hugh Hicks
S.Slabyhoudek
M-Jay
Fort Myers, FL.
Monsieur Ara
Fin Stewart
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Osmium filament lamps. Caption card reads: "Osmium filament lamps. Developed by Carl Auer von Weisbach, the inventor of the gas mantle. Extremely rare since burned out lamps were reclaimed to recycle the osmium. The osmium lamp was the first to employ a metallic filament." |
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