To Francis Darwin 6 January 1872
Down, | Beckenham, Kent.
Jan 6. 1872
My dear Frank
Very many thanks for all the trouble you have taken. I do not quite understand one or 2 points. You speak of ridges running down the slope; therefore I suppose your wavy line A is a horizontal section of the surface; but if so, how can yr Red letters D & E represent an upper & lower part of the same slope?1 Lastly, I do not feel sure whether the difference in thickness of the slope between top & bottom (where I have put 2 blue crosses) refers to the ridges & furrows, or to the upper & lower part of the slope.
Please to answer this at your leisure & return the enclosed & I am very much obliged for the trouble you have taken | yours affectly | Ch. Darwin
CD annotations
Footnotes
Bibliography
Earthworms: The formation of vegetable mould through the action of worms: with observations on their habits. By Charles Darwin. London: John Murray. 1881.
Summary
Asks FD questions about his sketch [missing] of ridges and furrows. [FD’s answers are interlined.]
Letter details
- Letter no.
- DCP-LETT-8147
- From
- Charles Robert Darwin
- To
- Francis Darwin
- Sent from
- Down
- Source of text
- Natural History Museum, Library and Archives (General Manuscripts MSS DAR 29)
- Physical description
- LS(A) 2pp †
Please cite as
Darwin Correspondence Project, “Letter no. 8147,” accessed on 25 November 2024, https://www.darwinproject.ac.uk/letter/?docId=letters/DCP-LETT-8147.xml
Also published in The Correspondence of Charles Darwin, vol. 20
