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From W. H. Dallinger   10 January 1876

Summary

Has confirmed CD’s observations on Drosera.

Asks whether CD agrees that it is "no longer a fact" that the bladders of Utricularia vulgaris enable the plant to become lighter for fecundation and heavier when that act is accomplished. Plans to undertake further observations, under very high-powered microscopes, of mechanism of digestion.

Author:  William Henry Dallinger
Addressee:  Charles Robert Darwin
Date:  10 Jan 1876
Classmark:  DAR 162: 33
Letter no:  DCP-LETT-10352

To W. H. Dallinger   [after 10 January 1876]

Summary

CD has read all of WHD’s and J. J. Drysdale’s papers [on spontaneous generation, monads, and the origin of life] and finds them the best work on the subject.

The function of bladders in Utricularia is not to float the plant.

Author:  Charles Robert Darwin
Addressee:  William Henry Dallinger
Date:  [after 10 Jan 1876]
Classmark:  Royal Institution of Great Britain (RI MS CG/u/3)
Letter no:  DCP-LETT-10354

From W. H. Dallinger   29 June 1878

Summary

The results of WHD’s long series of investigations of effects of steadily and slowly altered environment on putrefactive organisms "palpably demonstrate [CD’s] great doctrine".

Author:  William Henry Dallinger
Addressee:  Charles Robert Darwin
Date:  29 June 1878
Classmark:  DAR 162: 34
Letter no:  DCP-LETT-11576

To W. H. Dallinger   2 July 1878

Summary

Has no doubt WHD’s experiments on mutation of lower organisms under changed conditions of life will be curious and valuable. The fact of their becoming accustomed to much higher temperatures than those to which they are adapted is very remarkable. It explains the existence of algae in hot springs.

Author:  Charles Robert Darwin
Addressee:  William Henry Dallinger
Date:  2 July 1878
Classmark:  Dallinger 1887, p. 191
Letter no:  DCP-LETT-11587
Document type
letter (4)
Correspondent
Date
1876 (2)
1878 (2)
letter