"Try only 1 or 2 drops of Formic A[cid]."
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The Charles Darwin Collection
The Darwin Correspondence Project is publishing letters written by and to the naturalist Charles Darwin (1809–1882). Complete transcripts of letters are being made available through the Project’s website (www.darwinproject.ac.uk) after publication in the ongoing print edition of The Correspondence of Charles Darwin (Cambridge University Press 1985–). Metadata and summaries of all known letters (c. 15,000) appear in Ɛpsilon, and the full texts of available letters can also be searched, with links to the full texts.
"Try only 1 or 2 drops of Formic A[cid]."
Fears all the seeds are dead. Will try with less vapour of formic acid.
Observations on bees’ biting holes in Lathyrus.
Suggests an experiment FD could carry out with Drosera.
CD is working on Mimosa, and "everything has turned out as perversely as possible".
Pollination and floral structure of Lathyrus. Asks where bees bite through the flowers.
Asks FD to bring any book that gives the affinities of the various earths, alkalis and metals.
Asks for details about microscope parts.
Wants FD to ask Hooker for species of Desmodium; CD believes he has found new movements.
Also ask whether Hooker has Drosophyllum.
Lists observations he would like FD to make on the dried species of Desmodium at Kew.
Wants FD to look at the little lateral leaflets of Desmodium. CD has "a wild hypothesis that the little leaflets may be tendrils reconverted into leaflets".
Asks FD to come early to write from dictation.
Thanks Amy for her drawing of Utricularia montana.
Asks FD to make out [Hermann] Hoffmann’s conclusions about the fertilisation of Phaseolus multiflorus [in Untersuchungen zur Bestimmung des Werthes von Species und Varietät (1869)].
Begs FD’s pardon: his notes on Utricularia amethystina are on same page with those on U. nelumbifolia.
Has been examining Utricularia minor. Same essential structure but catches smaller Entomostraca. One bladder had 24, another 20, and another 15 Entomostraca. "What slaughter! We must make out the functions of the beast––".
Sends a chapter [of Insectivorous plants]. Never was there anything so dull, but later chapters will be better. Please correct an error on p. 86.
Circular about the distribution of the overplus of his income and advice on investment.