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Darwin Correspondence Project

To Bernhard Studer   20 January [1847]

Down Farnborough | Kent

Jan 20th.


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.


Sedgwick, Adam. 1835. Remarks on the structure of large mineral masses, and especially on the chemical changes produced in the aggregation of stratified rocks during different periods after their deposition. [Read 11 March 1835.] Transactions of the Geological Society of London 2d ser. 3: 461–86.


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

Letter no.
Charles Robert Darwin
Bernhard Studer
Sent from
Source of text
Burgerbibliothek Bern, Bern, Switzerland
Physical description

Please cite as

Darwin Correspondence Project, “Letter no. 1054,” accessed on 23 January 2022,

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