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Darwin Correspondence Project

From William Jenner   21 November 1864

8 Harley St. W

Novr. 21st. 1864

My dear Sir

I have had the urine analysed. You had better omit the alkaline powders for a little while. Especially the magnesia, must be avoided.1

Continue the phosphate of Iron & phosphoric acid.2 After a fortnight let me know how you are & also let me have some more urine—

Yours very truly | Wm. Jenner


In his letter of 9 November 1864, Jenner had asked whether CD’s urine was alkaline when passed, and had advised him to stop taking potash if it was. Magnesia was among the other alkalis that Jenner had prescribed for CD in March (see letter to J. D. Hooker, 13 April [1864] and n. 6).


Has analysed CD’s urine and suggests he omit the alkaline powders. Continues to prescribe iron phosphate.

Letter details

Letter no.
William Jenner
Charles Robert Darwin
Sent from
London, Harley St, 8
Source of text
DAR 168: 53
Physical description
2pp †

Please cite as

Darwin Correspondence Project, “Letter no. 4677,” accessed on 18 September 2021,

Also published in The Correspondence of Charles Darwin, vol. 12