Sends analysis of burnt and unburnt samples.
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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.
Sends analysis of burnt and unburnt samples.
Sends sodium carbonate for Drosera experiments. Will try to determine what the solvent is.
Is going to Switzerland, so analysis of Drosera washings will be delayed. Agrees with CD that solvent is probably pepsin.
CD’s discovery of acidity of Drosera secretion is interesting. EF explains how hydrochloric acid can be detected and identified. [See Insectivorous plants, p. 88.]
Has sent CD some pure distilled water for his Drosera experiments.
The results of EF’s tests for acids in the secretion of Drosera are largely negative [see Insectivorous plants, p. 88].
Sends some litmus paper for CD.
Sends some phosphates of lime free of animal matter [see Insectivorous plants, p. 109].
Bullfinches’ instinctive capacity for removing nectaries from cowslips.
Variation in bullfinches’ instinctive ability to remove nectaries and ovaries from cowslips.
Sends information CD requested on phosphate of ammonia and on nitrogenous substances produced during putrefaction of animal matter.
Hearty thanks for the two bottles of pure water.
Requests permission to call upon EF any morning from Saturday through Tuesday.
His samples of earth have been sent for analysis. EF has saved CD and his son from wasted experimenting.
Requests chemical analysis of sample of both natural and burnt soil.
Gratitude for the invaluable assistance. Is disappointed that natural soil is richer than burnt. Problem of securing sufficient chemically pure soil to test growth of plants.
Asks whether he may call to discuss a chemico-physiological point.
Thanks for the Blue Book [Report to the Local Government Board on the water supplied to London].
Gives instructions for sending the pure water.
Has sent for the Wenham ice.
Enjoyed his talk with EF.
Fears that the promised bottle of pure water may have been despatched or stolen in passage. [See 11768a.]
Gives results of the experiments: the leaves in most cases make the water alkaline. It cannot be ammonia. He and his son, Francis, suspect potash, which is valued as a manure. Will be grateful for the analysis EF has offered.