From August Wilhelm von Hofmann 27 June 1862
R. College of Chemistry
June. 27. 1862.
My dear Sir
I have to apologize for transmitting to you only now the specimens of Carbonate of Ammonia and Gelatine, which I had promised to you.1 I have examined both; they are free from chlorine and may be used for your experiment.2 It was not quite easy to get a sample of gelatine without chlorine; a very considerable number of specimens, which I tested contained abundance of this element. In fact hydrochloric acid is the agent by which gelatine is generally separated from the earthy phosphates. At last I procured a sample from the french exhibition which I found to be pure and which I forward to you.3
Hoping that the chemicals may not arrive too late for your experiment, I remain | My dear Sir | Yours very sincerely | A W Hofmann
The Specimens are sent in a box forwarded by Rail
Footnotes
Bibliography
Correspondence: The correspondence of Charles Darwin. Edited by Frederick Burkhardt et al. 29 vols to date. Cambridge: Cambridge University Press. 1985–.
Insectivorous plants. By Charles Darwin. London: John Murray. 1875.
Reports by the juries: International Exhibition, 1862. Reports by the juries on the subjects in the thirty-six classes into which the exhibition was divided. London. 1863.
Summary
Forwards carbonate of ammonia and gelatine free of chlorine.
Letter details
- Letter no.
- DCP-LETT-3623
- From
- August Wilhelm von Hofmann
- To
- Charles Robert Darwin
- Sent from
- R. Coll. Chem.
- Source of text
- DAR 166.2: 232
- Physical description
- ALS 2pp †
Please cite as
Darwin Correspondence Project, “Letter no. 3623,” accessed on 24 April 2024, https://www.darwinproject.ac.uk/letter/?docId=letters/DCP-LETT-3623.xml
Also published in The Correspondence of Charles Darwin, vol. 10