To Bernhard Studer 20 January [1847]

Down Farnborough | Kent

Jan 20^th.

Sir

I have been so much interested by a letter of yours, in the last Edinburgh New Philosoph. Joournal,¹ on the laminæ in gneiss not having been formed as planes of deposition, that I have taken the liberty to send you a copy of my Geolog. Observ. on S. America, published last autumn on account of a discussion on this subject. If you read English I hope you will take the trouble to read from p. 162 to 168, in which I have endeavoured to show that the lamination (denominated by me foliation after a suggestion of Prof. Sedgwick)² of the metamorphic schists is a closely allied phenomenon with cleavage.

With many apologies for my presumption in thus addressing you, I beg to remain with much respect | Your faithful & obedt. sert | Charles Darwin

Studer 1847b.

Sedgwick 1835, pp. 477–80.

Manuscript Alterations and Comments

1.4 published last autumn] interl

1.8 cleavage.] after del illeg

Please cite as “DCP-LETT-1054,” in Ɛpsilon: The Charles Darwin Collection accessed on 5 June 2025, https://epsilon.ac.uk/view/dcp-data/letters/DCP-LETT-1054

Summary

Much interested in BS’s letter on gneiss ["Remarks on the geological relations of the gneiss of the Alps", Edinburgh New Philos. J. 42 (1847): 186–7].

Sends copy of South America.

Has shown that lamination of metamorphic schists closely allied with cleavage.

Letter details

Record number: DCP-LETT-1054
From: Charles Robert Darwin
To: Bernhard Studer
Date: 20 Jan [1847]
Sent from: Down
Source of text: Burgerbibliothek Bern, Bern, Switzerland
Physical description: 3pp

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Also published in The Correspondence of Charles Darwin, vol. 4.

To Bernhard Studer 20 January [1847]

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