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Darwin Correspondence Project

Geological-Observations-CD-1891.jpg

Darwin's Geological observations
http://www.biodiversitylibrary.org/item/124947#page/9/mode/1up
Geological observations on the volcanic islands and parts of South America visited during the voyage of H.M.S. 'Beagle'
Image from the Biodiversity Heritage Library. Digitised by Smithsonian Libraries