To Edward Frankland 22 July 1874
Down, | Beckenham, Kent.
July 22 1874
My dear Professor Frankland
Can you tell me what is the specific gravity of Phosphate of Ammonia? In Watt’s Dict. I find the Spec. grav. of several phosphates of Amm., but then I do not know which is the common phos.1
I bought a bottle from Hopkin & Williams2 labelled simply “phos. of Amm.”, containing a colourless chrystaline mass, & it is of this that I want to know the specific gravity. I enclose a card addressed, & if you will write the number on it, it will save you a little trouble.
Yours very sincerely | Ch. Darwin
Footnotes
Bibliography
Correspondence: The correspondence of Charles Darwin. Edited by Frederick Burkhardt et al. 29 vols to date. Cambridge: Cambridge University Press. 1985–.
Marginalia: Charles Darwin’s marginalia. Edited by Mario A. Di Gregorio with the assistance of Nicholas W. Gill. Vol. 1. New York and London: Garland Publishing. 1990.
Post Office London directory: Post-Office annual directory. … A list of the principal merchants, traders of eminence, &c. in the cities of London and Westminster, the borough of Southwark, and parts adjacent … general and special information relating to the Post Office. Post Office London directory. London: His Majesty’s Postmaster-General [and others]. 1802–1967.
Watts, Henry. 1863–8. A dictionary of chemistry and the allied branches of other sciences. 5 vols. London: Longman, Green, & Co.
Watts, Henry. 1872–4. A dictionary of chemistry and the allied branches of other sciences. 2d edition. 5 vols. London: Longman, Green, & Co.
Summary
Asks for the specific gravity of common phosphate of ammonia.
Letter details
- Letter no.
- DCP-LETT-9559A
- From
- Charles Robert Darwin
- To
- Edward Frankland
- Sent from
- Down
- Source of text
- The John Rylands Library, The University of Manchester
- Physical description
- LS 2pp
Please cite as
Darwin Correspondence Project, “Letter no. 9559A,” accessed on 23 April 2024, https://www.darwinproject.ac.uk/letter/?docId=letters/DCP-LETT-9559A.xml
Also published in The Correspondence of Charles Darwin, vol. 22
