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To F. C. Donders   7 July 1874

Summary

Asks about the effect of atropine on the eye. Is interested in parallel case: influence of phosphate of ammonia on glands of Drosera.

Author:  Charles Robert Darwin
Addressee:  Frans Cornelis (Franciscus Cornelius) Donders
Date:  7 July 1874
Classmark:  DAR 143: 417
Letter no:  DCP-LETT-9535

From F. C. Donders   12 July 1874

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Summary

On hearing of CD’s work with Drosera, tells of his experiment showing extreme sensitivity of the iris of a dog’s eye to atropine. [See Insectivorous plants, p. 173.]

Author:  Frans Cornelis (Franciscus Cornelius) Donders
Addressee:  Charles Robert Darwin
Date:  12 July 1874
Classmark:  DAR 58.1: 79–80
Letter no:  DCP-LETT-9545

To F. C. Donders   15 July 1874

Summary

Discusses effect of atropine solution on eye,

and effect of phosphate of ammonia solution on gland of Drosera.

Would like to see work by T. W. Engelmann and possibly one by Dr De Ruyter.

Author:  Charles Robert Darwin
Addressee:  Frans Cornelis (Franciscus Cornelius) Donders
Date:  15 July 1874
Classmark:  American Philosophical Society (Mss.B.D25.)
Letter no:  DCP-LETT-9547
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letter (3)
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1874
07
07 (1)
12 (1)
15 (1)
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