Observations on Drosera: plants can distinguish minute quantities of nitrogenous substances.
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Observations on Drosera: plants can distinguish minute quantities of nitrogenous substances.
Owen wants to be civil, and sneer behind CD’s back.
Those, like Rudolph Wagner, who want to go halfway on theory, are "booked to go further".
Anatomy of orchids.
Huxley says K. E. von Baer goes "a great way with me".
CD has a low opinion of British entomologists.
Lyell’s ingenious difficulties with natural selection show he is in earnest.
Asks JDH to observe beetles and variation of stripes in mules on his Syrian tour.
Thanks JDH for agreeing to observe coats of asses and mules in Middle East.
Asks for observations on vigour of plants as JDH ascends mountains.
Ad hominem article in Athenæum [review of John Tyndall, Glaciers of the Alps, 1 Sept 1860, pp. 280–2].
Reports extensive experiments on Drosera.
Observations on orchid anatomy.
Welcomes JDH home from Middle Eastern expedition.
Preparing new edition of Origin and asks for JDH’s corrections and criticisms.
Third edition of Origin will answer reviewers.
Drosera experiments detailed.
Hopes for W. H. Harvey’s conversion.
Henry Fawcett’s article on Origin [Macmillan’s Mag. 3 (1860): 81–92] quotes JDH’s Oxford speech.
On JDH’s suggestions for new edition of Origin.
Gray’s Atlantic Monthly articles to be published [in England] as a pamphlet.
Analysing results of last spring’s Primula experiments, CD infers pollen of short-styled plants "suits" long-styled plants.
Sends JDH note on adaptation of an Australian Compositae for dispersal in dry climate. Is it too trivial to publish? [Collected papers 2: 36–8].
Feels his poor stomach "saved" him from overworking his head.
CD writes of his admiration for pollination contrivances in Gymnadenia. Ask George Bentham whether this plant should be removed from genus Orchis.
Darwin references a "capital" letter he has received from ARW following ARW's reading of On the Origin of Species.
CD’s observations on curved styles read well. JDH seeks morphological rationale of curvature in the position of nectaries.
He has avoided lecturing to Royal Family’s children at Buckingham Palace.
Has examined Leschenaultia and concludes the external viscid surfaces have nothing to do with the stigmatic surface. Agrees with CD’s style and nectary conclusions; accounts for their form and position in irregular flowers by describing floral development.
[Enclosed are some queries by CD with answers by JDH. Gives information on seed setting by Mucuna
and an opinion on the abruptness of N. and S. limits of plant ranges.]
Glad to hear good news of Etty [Henrietta Darwin].
CD’s observations on Scaevola are capital. The indusium collects the pollen and is the homologue of the pollen-collecting hairs of Campanula. A boat-shaped organ forms a second indusium, the inside base of which forms the stigmatic surface. The latter later protrudes as horns, forming the stigma.
Describes W. H. Harvey’s scientific career and thinks his letter interesting. Agrees with Harvey that the primary agency of natural selection is as great a mystery as ever. [Response to 2823.]
JDH reports on the debate on the Origin at Oxford [BAAS] meeting.
Encourages CD’s work in vegetable physiology.
Ascending the Lebanon JDH noted limits of plant distribution as CD requested: lower limits of a genus sharper than upper. Sharpness of boundaries related to a plant’s moisture requirement.
Impressed by "sporadic" distribution at the Jardin des Plantes in Paris.
JDH’s page-by-page criticisms on Origin, first edition, as requested by CD for preparation of the third edition.