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From Robert Hunt 19 July 1855
Summary
Discusses how best to simulate the light at a particular point on the earth’s surface using coloured glass; considers sunlight as composed of three "principles", varying in proportion according to latitude, which affect germination, lignification, and floriation.
Author: | Robert Hunt |
Addressee: | Charles Robert Darwin |
Date: | 19 July 1855 |
Classmark: | DAR 261.11: 17 |
Letter no: | DCP-LETT-1721 |
From Robert Hunt 24 July 1855
Summary
Informs CD which colours of glass accelerate germination, lignification, and floriation; advises CD on obtaining such glass and offers his help in any experiments.
Author: | Robert Hunt |
Addressee: | Charles Robert Darwin |
Date: | 24 July 1855 |
Classmark: | DAR 261.11: 18 |
Letter no: | DCP-LETT-1730 |