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From Wilhelm Pfeffer 24 October 1881
Summary
Will send 2d vol. [of his Pflanzenphysiologie (1881)].
CD has occasionally misinterpreted him in Movement in plants; by "after-working" (Nachwirkung) he means "after-working of preceding movements", not of the irritating cause [light].
| Author: | Wilhelm Friedrich Philipp (Wilhelm) Pfeffer |
| Addressee: | Charles Robert Darwin |
| Date: | 24 Oct 1881 |
| Classmark: | DAR 174: 38, 38/1 |
| Letter no: | DCP-LETT-13425 |
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 |
