To G. H. Darwin [before 25 October 1881]1
[66 Hills Road, Cambridge.]
George
Ask Lord R. whether gas-men in testing light, exclude the diffused light; for I suppose that they cannot always make the trials in the same room, & therefore with exactly the same amount of diffused light—2
Footnotes
The date is established by the relationship between this note and the letter to Julius Wiesner, 25 October 1881.
John William Strutt was the third Baron Rayleigh. In recent experiments on the response of plants to light, Julius Wiesner had claimed that the intensity of light was not proportional to the distance of the plant from the source (see Wiesner 1881, p. 78); George suggested that the presence of diffused light might account for Wiesner’s results (see letter to Julius Wiesner, 25 October 1881).
Bibliography
Wiesner, Julius. 1881. Das Bewegungsvermögen der Pflanzen. Eine kritische Studie über das gleichnamige Werk von Charles Darwin nebst neuen Untersuchungen. Vienna: Alfred Hölder.
Summary
Will GHD ask Lord R[ayleigh] whether "gas-men in testing light, exclude the diffused light".
Letter details
- Letter no.
- DCP-LETT-12961
- From
- Charles Robert Darwin
- To
- George Howard Darwin
- Sent from
- unstated
- Source of text
- DAR 210.1: 115
- Physical description
- AL 1p
Please cite as
Darwin Correspondence Project, “Letter no. 12961,” accessed on 31 March 2023, https://www.darwinproject.ac.uk/letter/?docId=letters/DCP-LETT-12961.xml
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