Ɛpsilon

From Trenham Reeks   25 February 1845

Museum of Economic Geology

25th. Feby. 1845.

Dear Sir,

I have much pleasure in enclosing you a copy of the analysis of the Salt (No 759.)1 I can find nothing in it to account for its inferiority and my former suspicion of its being Potassium proves groundless.

I am, Dear Sir | Your obedient Servt. | Trenham Reeks C Darwin Esqre. Analysis of Salt (No. 759) from Patagonia. Chloride of Sodium— 99.52 Sulphate of Lime 0.26 Earthy matter 0.22 —– 100.00 —–

CD annotations

Top of first page: ‘Tuff specimens’ pencil, del pencil; ‘Second d’Orbigny about value of Salt’2; ‘Not in Geology’ pencil
1
From a salt lake near the Rio Negro (see Journal of researches 2d ed., p. 66, and South America, p. 74, where the analysis is quoted).
2
A reference to Orbigny 1835–47, 2: 130, in which the mining of salt from the pans of Andres Pas is discussed.

Please cite as “DCP-LETT-831,” in Ɛpsilon: The Charles Darwin Collection accessed on 5 June 2025, https://epsilon.ac.uk/view/dcp-data/letters/DCP-LETT-831