Autor: Daderot
Título: Exhibit in the Museum of Science and Industry, Chicago, Illinois, USA. Photography was permitted in the museum without restriction.
Data: 22 August 2014, 11:04:34
Origem: Own work
Fonte: https://commons.wikimedia.org/wiki/File:Demonstration_light_bulb,_stated_to_be_the_first_light_bulb_ever_lit_in_public,_1879,_from_Henry_Ford_collections_-_Museum_of_Science_and_Industry_(Chicago)_-_DSC06446.JPG
Licença: https://creativecommons.org/publicdomain/zero/1.0/deed.en
21-10-1879