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Sharpe, Daniel in addressee 
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From:
Charles Robert Darwin
To:
Daniel Sharpe
Date:
16 Oct [1851]
Source of text:
American Philosophical Society (Mss.B.D25.)
Summary:

Thanks DS for writing about his research on foliation and cleavage. Discusses nature of slate and metamorphic schists.

Makes suggestions for the paper DS is preparing for the Royal Society and raises questions for his consideration; CD hopes he can attend the Society meeting when the paper is read ["On foliation and cleavage of Scotland", Philos. Trans. R. Soc. Lond. 142 (1852): 445–62].

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Daniel Sharpe
Date:
12 Nov [1854]
Source of text:
University of Chicago Library, Special Collections Research Center
Summary:

Regrets he cannot come to hear DS’s paper ["On the structure of Mont Blanc", Q. J. Geol. Soc. Lond. 11 (1855): 11–27]. Has a lively interest in the subject.

Edward Forbes has misrepresented his view on foliation and cleavage [Athenæum 30 Sept 1854].

CD is convinced DS’s view will replace Huttonian and Lyellian view of metamorphic schists.

Recommends H. C. Sorby’s paper [probably "On the origin of slaty cleavage", Edinburgh New Philos. J. 55 (1853): 137–50].

Contributor:
Darwin Correspondence Project