Showing 1–20 of 25 items
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.
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.
Thinks it would be a good idea to give the typing machine to Karl Semper.
Othniel Marsh of Yale would like to visit CD.
JDH details the subscription fund’s finances.
Has finished lecture for Royal Society on N. American plant distribution.
Reports results of crosses between the two forms of Viola tricolor: 1. Female small flower crossed with male large flower yields all small flowers (cleistogamous self-fertilisation suspected); 2. Male small flower crossed with female large yields intermediate flowers; 3. Large flower crossed with large flower yields self-sterility symptoms.
He has been talking to Julius von Sachs about sleeping plants that move with and without growth.
Sleep in Porlieria studied.
Oats begin germinating.
Has taken OCM to the photographer’s, and is sending photographs to be signed.
Writes about [H. R. Hope-]Pinker, who tried to approach CD via the Royal Institution in order to sculpt a bust of him. WS advises against agreeing to sit for him.
Refers to Charles Lagrange, who is working on the same subject as GHD, but in a fundamentally different way.
Sends drawings of specimens [of Thalia] CD requested.
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.
Has found examples of small female flowers in Stachys germanica and Ranunculus bulbosus.
Sends specimens.
Sensitive plants.
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.
Informs CD that certain cash from U. S. investments does not have income tax deducted.
Thanks CD for his kind letter and accepts his offer of a writing machine.
Thanks CD for his condolences. Reminisces about their youth.
On the death of his naturalist friend, W. C. Hewitson.
Idea has struck him that might be of use to CD: that rapid changes during growth as in some plants and in insect metamorphosis may bear analogy to the slower changes resulting in the formation of new varieties.
