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From William Hopkins   3 March 1845

Summary

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

Author:  William Hopkins
Addressee:  Charles Robert Darwin
Date:  3 Mar 1845
Classmark:  DAR 39: 53
Letter no:  DCP-LETT-835

From William Hopkins   27 April 1846

Summary

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

Author:  William Hopkins
Addressee:  Charles Robert Darwin
Date:  27 Apr 1846
Classmark:  DAR 39: 54–6
Letter no:  DCP-LETT-975

From William Hopkins   5 May 1846

Summary

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

Author:  William Hopkins
Addressee:  Charles Robert Darwin
Date:  5 May 1846
Classmark:  DAR 39: 57–8
Letter no:  DCP-LETT-978
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letter (3)
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1845 (1)
1846 (2)
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