From W. de W. Abney to Leonard Darwin [before 27 June 1874]1
Per-centage composition of Carbonate of Ammonia as sold purified etc:
| Gaseous Ammonia =(NH3) | = | 28.81 |
| Carbonic Acid Gas (carbonic anhydride)= CO2 | = | 55.93 |
| Water (of constitution) = H2O | = | 15.26 |
| Propn of Nitrogen | = | 23.424 |
Nitrate of Ammonia (NH4NO3) (at 250o C) NH4NO3=2H2O (Water) + N2) (Nitrous Oxide) ∴ the salt really contains no water of crystallization, although a crystalline salt
Proportion of Nitrogen=35pr cent
Ordinary tribasic phosphate of ammonia (2NH4HPO4) + 4H2O contains.
| Water (of cryst:) | 35.33 p.c. |
| Nitrogen | 13.425 " |
In the anhydrous condition
| Water | nil |
| Nitrogen | 21.21 p.c.2 |
CD annotations
Bottom of letter: ‘Mr W W Abney | [LNE]’
Footnotes
The date is established by the relationship between this letter and the letter from Leonard Darwin to W. de W. Abney, [before 27 June 1874]
CD used the figures for the amount of nitrogen in these compounds in Insectivorous plants (see letter from Leonard Darwin to W. de W. Abney, [before 27 June 1874] and n. 2).
Bibliography
Insectivorous plants. By Charles Darwin. London: John Murray. 1875.
Summary
Answers questions about chemistry (see 9202).
Letter details
- Letter no.
- DCP-LETT-9196F
- From
- William de Wiveleslie Abney
- To
- Leonard Darwin
- Source of text
- DAR 58.1: 148
Please cite as
Darwin Correspondence Project, “Letter no. 9196F,” accessed on 19 April 2024, https://www.darwinproject.ac.uk/letter/?docId=letters/DCP-LETT-9196F.xml
Also published in The Correspondence of Charles Darwin, vol. 22
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