Letter 9647A
Darwin, C. R. to Haeckel, E. P. A.
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Thanks for 5th edition of his book [Natürliche] Schöpfungsgeschichte.
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CD continues with his experiments on the digestive power of plants, which is much like that of mammals.
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Is also preparing a revised edition of Descent.
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Would welcome hearing more of his ideas about Pangenesis.
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Postscript about Anthropogenie, which has just arrived. EH's astonishing productivity.