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Letter 13476

Darwin, C. R. to Darwin, Francis

9 Nov [1881]

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    Comments on two letters received from W. F. P. Pfeffer [13425, 13464] who thinks Julius Wiesner's view that light, etc. acts directly on plants is wrong.

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    Is frantic over the number of letters received about worms; feels the enthusiasm of the reception of Earthworms is laughable.

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    Is confounded by Euphorbia rootlets and has re-examined the effect of carbonate of ammonia.


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