Summary

CD will visit Kew on way home from E. W. Lane’s hydropathy establishment.

Summary

J. S. Henslow’s defence of CD;

[Thomas?] Thomson’s opposition to Origin.

Summary

Henry Fawcett’s article on Origin [Macmillan’s Mag. 3 (1860): 81–92] quotes JDH’s Oxford speech.

Summary

Too ill to go to club.

Summary

Preparing new edition of Origin and asks for JDH’s corrections and criticisms.

Summary

Going for hydropathy. Too ill for Oxford BAAS meeting.

Pollination by minute insects.

CD proves his view regarding Goodenia stigmatic surfaces by dissection and following pollen-tubes up to grains.

Summary

Asa Gray’s articles in Proceedings of the American Academy of Arts and Sciences [10 Apr 1860] excellent; considering asking Athenæum to reprint them.

Summary

JDH coming to Down. Huxley will be invited.

Summary

Very pleased with Asa Gray’s letter to JDH [see 2638], which is "rich on Agassiz".

Summary

Asks JDH for some Goodenia.

Suggests Daniel Oliver try to cross Mimosa, noted for sterility.

Summary

Sends list of plants with asymmetry in nectar-secreting surfaces and pistils bent in that direction. Shows insect agency so important that structure has changed. Asks for contrary or confirming examples and that request be passed on to Daniel Oliver.

Summary

Convinced selection is the efficient cause. Less convinced of physical causes than JDH because he sees adaptation everywhere and that must be due to selection.

Summary

Reread JDH’s letter "with infinite pleasure".

Plans to visit Kew.

Summary

Observations on Drosera: plants can distinguish minute quantities of nitrogenous substances.

Summary

Floral anatomy of Goodeniaceae: although flowers seem to fertilise themselves by pistil moving to anther, CD shows that insect agency is necessary. Wants JDH to check his interpretation of stigmatic surface.

Summary

Applauds JDH’s reply [25 Feb 1860] to W. H. Harvey in Gardeners’ Chronicle.

Summary

CD intrigued by the pollination mechanism of Leschenaultia formosa.

CD interested in Thomas Bell’s rumour that Owen avows his review.

Curved styles and their relation to pollination.

Summary

Dissection of Leschenaultia convinces CD insect agency necessary for self-fertilisation in this case.

Primroses and cowslips seem universally to occur in two forms. Very curious to see which plants set seed.

Summary

Instructs JDH on how to pollinate Leschenaultia.

Evidence of Leschenaultia and the dioecious condition of cowslips and Auricula is making necessity of insect pollination "clear and clearer".

Summary

Welcomes JDH home from Middle Eastern expedition.