JDH’s "grand speech" on receiving the Royal Medal.
Showing 21–40 of 232 items
JDH’s "grand speech" on receiving the Royal Medal.
Is Bentham’s list of aberrant genera biased by exclusion of genera with many species?
JDH’s belief that Aquilegia varieties are one species is consistent with their great interfertility.
Debates aberrant species, e.g., Ornithorhynchus and Echidna, with JDH. CD argues they are result of extinction having removed intermediate links to allied forms.
Studying effects of disuse in wings of tame and wild ducks.
Tabulations showing that number of species in a genus is not correlated with number of genera in an order.
Latitude overrules everything in distribution. Alpine distributions are like insular. Tabulating proportions.
T. V. Wollaston’s Madeira insects: many flightless, thus not blown to sea. TVW’s insects do not confirm Forbes’s Atlantis.
CD has begun seed-salting experiments. Wants JDH to write which seeds he expects to be easily killed [in salt water].
CD’s idea that coal-plants lived in salt water like mangroves made JDH savage.
Pea self-fertilisation: has forty-five varieties growing side by side.
Describes seed-salting experiments: e.g., immersion in tank filled with snow. Reports some successful germinations.
Made list of naturalised plants from Asa Gray’s Manual [of Botany] to calculate the proportions of the great families.
Rejects JDH’s suggestion that seed-salting experiments be conducted on huge scale. Only wishes to demonstrate possibility of sea transport, not establishment of any particular insular flora. More seed results.
More on seed-salting. JDH’s admission that he expected seeds to die in a week gives CD "a nice little triumph".
JDH to be appointed Assistant Director at Kew.
On where to publish seed-salting paper. Floating problem perhaps more important than germination.
CD upset because salted seeds do not float.
CD’s seed paper in Gardeners’ Chronicle [Collected papers 1: 255–8];
CD attacks Forbes’s "Atlantis".
Considers solutions to floating problem. Decides to test Azores seeds.
Photographs and drawings of CD.
Plant movement experiments with Hedysarum gyrans.
Asks JDH not to send H. C. Watson’s paper on Azores plants [Hooker’s Lond. J. Bot. 2 (1843): 1–9, 125–31, 394–408; 3 (1844): 582–617; 6 (1847): 380–97].
CD cannot endure trying all the Azorean seeds.
Seeds: worried they will turn into another barnacle job.
Studies plants colonising abandoned field.
Experiment on plant sleep movements.
CD objects to "Atlantis" because no evidence; does not affect species theory.
Detailed response to JDH’s critique of sea transport and continental connection theories. JDH’s claim that low plants are widely distributed fits both theories.
Species theory does not touch origin of life.
Thanks for Hedysarum.
Pleasure in identifying field plants.
Has used borrowing rights at Linnean Society Library arranged for him by JDH.
Has named 35 species of grasses.
Seed-salting continues.
CD experiments: sowing seeds in fields; "breaking" seeds’ constitution with coloured light; plant hybridisation. Compiling works on hybridism.
Respect for W. B. Carpenter.
Note on "nectar secreting" to Gardeners’ Chronicle [Collected papers 1: 258–9].
Has read a paper, presumably by JDH, using the Madeiran flora to argue against Forbes’s doctrine.
JDH asked how far CD will go in attributing common descent; he intends to show "the facts & arguments for & against the common descent of species of same genus; & then show how far the same arguments tell for or against forms, more & more widely different".
Parcels sent to Down by coach may get lost.