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To Robert Hunt 22 July [1855]
Summary
Mentions RH’s book on light [Researches on light in its chemical relations, 2d ed. (1854)]. Asks about coloured glass used in experiments on plants.
| Author: | Charles Robert Darwin |
| Addressee: | Robert Hunt |
| Date: | 22 July [1855] |
| Classmark: | American Philosophical Society (Mss.B.D25.) |
| Letter no: | DCP-LETT-1727 |
To Robert Hunt 31 July [1855]
Summary
Mentions experiments on plants involving coloured glass. Encloses correspondence from glass maker and asks advice.
| Author: | Charles Robert Darwin |
| Addressee: | Robert Hunt |
| Date: | 31 July [1855] |
| Classmark: | Bonhams (dealers) (28 September 2004) |
| Letter no: | DCP-LETT-1734 |
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 |
Author
| Darwin, C. R. | (2) |
| Hunt, Robert | (2) |
Addressee
| Darwin, C. R. | (2) |
| Hunt, Robert | (2) |
