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Engraving depicting Davy's experiment with a mercury vapour light
Engraving depicting Davy's experiment with a mercury vapour light. A long u-tube contains two columns of mercury: both ends of the tube are immersed in cups of mercury. When an electric current is passed through, the air between the columns glows with a feeble bluish light. Heating intensified the light, and the introduction of air bubbles changed it to purple. Davy concluded that the light was due to glowing mercury vapour.
Details
ID
144859661
Collection
License type
Editorial
Photographer
Creation date
22-09-2020
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