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Darwin, C. R. in correspondent 
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DCP-LETT-835

From:
William Hopkins
To:
Charles Robert Darwin
Date:
3 Mar 1845
Source of text:
DAR 39: 53
Summary:

Comments on a compass diagram designed to show the dip, strike, and anticlinal lines of a geological formation.

Contributor:
Darwin Correspondence Project

DCP-LETT-975

From:
William Hopkins
To:
Charles Robert Darwin
Date:
27 Apr 1846
Source of text:
DAR 39: 54–6
Summary:

Writes concerning CD’s "geometrico-geological problem". Attempts to square some of CD’s observations with certain geometrical theories concerning geological elevation.

Contributor:
Darwin Correspondence Project

DCP-LETT-978

From:
William Hopkins
To:
Charles Robert Darwin
Date:
5 May 1846
Source of text:
DAR 39: 57–8
Summary:

Discussion of CD’s geological problem, relating to elevation of laminated beds around a rising granitic ridge.

Contributor:
Darwin Correspondence Project
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