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Cotton base of a filament, one of set of specimens illustrating manufacture of incandescent electric lamps, by Edison and Swan Electric Light Co., c. 1900
Lamp ready for exhausting, one of set of specimens illustrating manufacture of incandescent electric lamps, by Edison and Swan Electric Light Co., c. 1900
Lamp ready for exhausting, one of set of specimens illustrating manufacture of incandescent electric lamps, by Edison and Swan Electric Light Co., c. 1900
Lamp sealed and ready for testing, one of set of specimens illustrating manufacture of incandescent electric lamps, by Edison and Swan Electric Light Co., c. 1900
Lamp sealed and ready for testing, one of set of specimens illustrating manufacture of incandescent electric lamps, by Edison and Swan Electric Light Co., c. 1900
Finished lamp, one of set of specimens illustrating manufacture of incandescent electric lamps, by Edison and Swan Electric Light Co., c. 1900
Finished lamp, one of set of specimens illustrating manufacture of incandescent electric lamps, by Edison and Swan Electric Light Co., c. 1900
Incandescent electric lamp, Swan type, by Edison and Swan United Electric Lighting Co. Ltd, probably 1882
Incandescent electric lamp, Edison type, by Edison and Swan United Electric Lighting Co. Ltd, probably 1882
Incandescent electric lamp, carbon filament, 16 candle power, 100 volts, Edison Swan Electric Co. Ltd
Incandescent electric lamp, U filament and hook suspension, 60 volts, made by Woodhouse and Rawson, late 19th - early 20th century
Incandescent electric lamp, sperical bulb with looped filament and side hook suspension, late 19th - early 20th century
Incandescent electric lamp, Lane-Fox type, U filament with mercury contacts, late 19th - early 20th century