From Francis Darwin [after 14 July 1878]
Summary
Thinks it would be a good idea to give the typing machine to Karl Semper.
| Author: | Francis Darwin |
| Addressee: | Charles Robert Darwin |
| Date: | [after 14 July 1878] |
| Classmark: | DAR 274.1: 48 |
| Letter no: | DCP-LETT-11553F |
From Francis Darwin [July 1878]
Summary
Reports observations on day and night movement in Porlieria.
| Author: | Francis Darwin |
| Addressee: | Charles Robert Darwin |
| Date: | [July 1878] |
| Classmark: | DAR 209.14: 181 [2nd sheet] |
| Letter no: | DCP-LETT-11578 |
From Francis Darwin [before 7 July 1878]
Summary
He has been talking to Julius von Sachs about sleeping plants that move with and without growth.
| Author: | Francis Darwin |
| Addressee: | Charles Robert Darwin |
| Date: | [before 7 July 1878] |
| Classmark: | DAR 274.1: 57 |
| Letter no: | DCP-LETT-11593F |
From Francis Darwin [after 7 July 1878]
Summary
Sleep in Porlieria studied.
Oats begin germinating.
| Author: | Francis Darwin |
| Addressee: | Charles Robert Darwin |
| Date: | [after 7 July 1878] |
| Classmark: | DAR 209.7: 157 |
| Letter no: | DCP-LETT-11596 |
From Francis Darwin [12 July 1878]
Summary
Chlorophyll development in oat seedling.
Lists the sleeping plants he has seen.
Julius Sachs thinks Hugo de Vries has not cleared up everything [about climbing plants]. But Sachs has not worked on the mechanical problem.
| Author: | Francis Darwin |
| Addressee: | Charles Robert Darwin |
| Date: | [12 July 1878] |
| Classmark: | DAR 209.1: 156–7, DAR 209.14: 88 |
| Letter no: | DCP-LETT-11604 |
From Francis Darwin [before 17 July 1878]
Summary
More sleepers from green-house.
Julius Sachs’s view of climbing plants: he distinguishes between nutation to find a support and growth after support is found.
| Author: | Francis Darwin |
| Addressee: | Charles Robert Darwin |
| Date: | [before 17 July 1878] |
| Classmark: | DAR 209.1: 155; DAR 274.1: 50, 52 |
| Letter no: | DCP-LETT-11613 |
From Francis Darwin [21 July 1878]
Summary
Has been investigating nutational movements of climbing plants; comments on the opinions of Julius von Wiesner and Julius Sachs. Remarks on the sleep movements of certain plants and the mechanism of tendril curvature. Is experimenting with Porlieria.
Has visited K. G. Semper’s laboratory.
| Author: | Francis Darwin |
| Addressee: | Charles Robert Darwin |
| Date: | [21 July 1878] |
| Classmark: | DAR 162: 59, DAR 209.8: 151 |
| Letter no: | DCP-LETT-11623 |
From Francis Darwin 24 and 25 July 1878
Summary
Notes Julius Sachs’s opinion on the heliotropism of moulds: he can see no use in the response.
C. E. Stahl is working on swarm spores which can be made both helio- and apheliotropic.
Sachs has told him that some ferns sleep, and he suspects that some grasses may move.
Sachs also feels they may be working at bloom from a wrong point of view and suggests leaves may need to keep dry in order to keep their stomata open.
| Author: | Francis Darwin |
| Addressee: | Charles Robert Darwin |
| Date: | 24 and 25 July 1878 |
| Classmark: | DAR 162: 60, DAR 209.6: 198 |
| Letter no: | DCP-LETT-11628 |
