Davy's electric egg. Intense light from voltaic arc between points of two carbon rods. It was not until some years after Davy's death in 1829 that carbon arc lamp widely used because rods need frequent adjustment. Davy used boxwood carbon. Engraving . Humphry Davy (1778-1829).
credit: culture-images/ua
author: 93200
image ID: ci01377960.jpg
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