Section through a geyser in Iceland. An increase in heat to cavity C causes steam and water to be ejected via A to P. Theorie des Geysers. Copied from an illustration by Scottish geologist Sir George Steuart Mackenzie in his Travels in the Island of Iceland, 1811. Handcoloured copperplate engraving from Carl Bertuch's Bilderbuch fur Kinder (Picture Book for Children), Weimar, 1815. A 12-volume encyclopedia for children illustrated with almost 1,200 engraved plates on natural history, science, costume, mythology, etc., published from 1790-1830.

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Size: 4693px × 7016px
Photo credit: © Florilegius / Alamy / Afripics
License: Licensed
Model Released: No

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