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To Francis Darwin   [9 November 1881]

Summary

Tells some of his observations on root cells. Has thought of three good experiments to oppose Julius von Wiesner.

Author:  Charles Robert Darwin
Addressee:  Francis Darwin
Date:  [9 Nov 1881]
Classmark:  DAR 211: 70
Letter no:  DCP-LETT-13065

To A. E. Graves   9 November 1881

Summary

Cannot explain worm behaviour observed by AEG. Cannot believe in power of vision. Inclined to speculate on capacity for distinguishing damp air.

Author:  Charles Robert Darwin
Addressee:  Anthony Elly Graves
Date:  9 Nov 1881
Classmark:  DAR 144: 347
Letter no:  DCP-LETT-13475

To Francis Darwin   9 November [1881]

Summary

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.

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

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

Has thought of three good experiments to oppose Wiesner.

Author:  Charles Robert Darwin
Addressee:  Francis Darwin
Date:  9 Nov [1881]
Classmark:  DAR 211: 70, DAR 211: 89
Letter no:  DCP-LETT-13476