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Dallinger, W. H. in correspondent 
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From:
William Henry Dallinger
To:
Charles Robert Darwin
Date:
10 Jan 1876
Source of text:
DAR 162: 33
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.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
William Henry Dallinger
Date:
[after 10 Jan 1876]
Source of text:
Royal Institution of Great Britain (RI MS CG/u/3)
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.

Contributor:
Darwin Correspondence Project
From:
William Henry Dallinger
To:
Charles Robert Darwin
Date:
29 June 1878
Source of text:
DAR 162: 34
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".

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
William Henry Dallinger
Date:
2 July 1878
Source of text:
Dallinger 1887, p. 191
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.

Contributor:
Darwin Correspondence Project