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To Robert Hunt   22 July [1855]


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]


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

To Robert Hunt   3 May [1866]


Encloses a sketch of the principal events in his life [for RH’s memoir on CD in Walford, ed., Portraits of men of eminence (1863–7)].

Author:  Charles Robert Darwin
Addressee:  Robert Hunt
Date:  3 May [1866]
Classmark:  The Natural History Museum (tipped into General Special Collections MSS HUN/49)
Letter no:  DCP-LETT-5524

From Robert Hunt   19 July 1855


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


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
Document type
letter (5)
Darwin, C. R.[X]
Hunt, Robert[X]
1855 (4)
1866 (1)