Search: Davidson, Thomas in addressee 
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Text Online
From:
Michael Faraday
To:
Thomas Davidson
Date:
15 October 1835
Source of text:
Uppsala University Handskriftsavdelningen ì Erik Waller's Collection of Autographs
Summary:

No summary available.

Contributor:
Faraday Project
From:
Charles Robert Darwin
To:
Thomas Davidson
Date:
23 Dec [1856]
Source of text:
American Philosophical Society (Mss.B.D25.142)
Summary:

Asks TD about variation among brachiopods.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Thomas Davidson
Date:
26 Apr 1861
Source of text:
DAR 143: 372
Summary:

Asks TD to carry out research on brachiopods to see whether the forms in one formation are intermediate between those above and below.

Describes unpublished study of spirifers by J. W. Salter.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Thomas Davidson
Date:
30 Apr 1861
Source of text:
DAR 143: 373
Summary:

Thanks TD for his letter. Difficulties with CD’s theory are many and great, but CD thinks the reason is that we underestimate our ignorance. The imperfection of the geological record counts heavily for CD. His greatest trouble is weighing "the direct effects … of changed conditions of life without any selection, with the action of selection on mere accidental (so to speak) variability. I oscillate much on this head, but generally return to my belief that the direct [effects] … have not been great."

Is surprised that any one, like W. B. Carpenter, can go as far as to believe all birds may have descended from one parent, but will not go further and include all the members of the same great division. Such beliefs make "Divine mockeries" of morphology and embryology, the most important of all subjects.

Contributor:
Darwin Correspondence Project
From:
Sir John Herschel
To:
Thomas Davidson
Date:
[9 February 1862]
Source of text:
RS:HS 6.36 (C: RS:HS 23.361)
Summary:

Outlines the differences between the telescope of his own father and that of Lord Oxmantown [William Parsons]. Comments on various lenses. Sends him a little work of his own on telescopes.

Contributor:
John Herschel Project
From:
Charles Robert Darwin
To:
Thomas Davidson
Date:
7 Apr 1873
Source of text:
American Philosophical Society (Mss.B.D25.426)
Summary:

Thanks TD for catalogue of his Cretacean fossils.

Regrets he cannot visit Brighton.

Contributor:
Darwin Correspondence Project