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From J. D. Hooker   26 July 1879

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Summary

JDH criticises John Ball’s theory of origin of higher plants in Carboniferous highlands, where low carbon dioxide levels permitted survival.

Author:  Joseph Dalton Hooker
Addressee:  Charles Robert Darwin
Date:  26 July 1879
Classmark:  DAR 104: 128–30
Letter no:  DCP-LETT-12173