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From Wilhelm Pfeffer 6 November 1881
Summary
It is impossible to trace the direct connections between stimuli and responses in plant movements. Disagrees with much of Julius von Wiesner [Die Bewegungsvermögen der Pflanzen (1881)]. Disagrees with CD on induced movements and circumnutation.
| Author: | Wilhelm Friedrich Philipp (Wilhelm) Pfeffer |
| Addressee: | Charles Robert Darwin |
| Date: | 6 Nov 1881 |
| Classmark: | DAR 174: 39 |
| Letter no: | DCP-LETT-13464 |
