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From F. C. Donders   17 May 1870

Summary

The illness and death of his daughter have delayed his answers to CD’s queries. He has, however, worked on the circulation of the eye and has almost finished a paper on it, which he will send to CD. In general, the views of Charles Bell are confirmed.

As for CD’s second query, he doubts that the relationship exists, but will answer fully in next letter.

Author:  Frans Cornelis (Franciscus Cornelius) Donders
Addressee:  Charles Robert Darwin
Date:  17 May 1870
Classmark:  DAR 162: 224
Letter no:  DCP-LETT-7141

To Frans Cornelis Donders   13 May [1870]

Summary

In a fortnight will begin to arrange notes on expression. Asks for FCD’s conclusions about the contraction of eye muscles. Is interested in abstract of FCD’s experiments on "rate of travelling of the nervous powers".

Author:  Charles Robert Darwin
Addressee:  Frans Cornelis (Franciscus Cornelius) Donders
Date:  13 May [1870]
Classmark:  American Philosophical Society (Mss.B.D25.)
Letter no:  DCP-LETT-7187

To F. C. Donders   19 May 1870

Summary

Expresses sympathy [on death of FCD’s daughter].

Will be grateful for his paper and letter.

Author:  Charles Robert Darwin
Addressee:  Frans Cornelis (Franciscus Cornelius) Donders
Date:  19 May 1870
Classmark:  American Philosophical Society (Mss.B.D25.)
Letter no:  DCP-LETT-7194

From F. C. Donders   27 May 1870

Summary

Has finished the article [on the action of the eyelids in Ned. Arch. Geneeskd. & Natuurkd. 5 (1870), also see 7238]; summarises: the occlusion of the eyelids protects the vessels, and the eye itself, against the danger of pressure caused by excessive expiratory action. The weakness of the conclusion is that the extent of the danger caused by the pressure to the normal state of the eye is not precisely known.

Author:  Frans Cornelis (Franciscus Cornelius) Donders
Addressee:  Charles Robert Darwin
Date:  27 May 1870
Classmark:  DAR 162: 225
Letter no:  DCP-LETT-7203

From F. C. Donders   28 May 1870

Summary

A detailed description of the physiological and anatomical processes related to the prolonged involuntary contraction of the orbicular muscles and the secretion of tears (as in retching, violent coughing, or laughing). [See Expression, p. 160.].

Author:  Frans Cornelis (Franciscus Cornelius) Donders
Addressee:  Charles Robert Darwin
Date:  28 May 1870
Classmark:  DAR 162: 226
Letter no:  DCP-LETT-7207

To F. C. Donders   3 June [1870]

Summary

Thanks FCD for information.

Hopes that translation of his paper will appear in Dublin Journal.

Notes experience of his son [Leonard Darwin] on engorgement of eyes with blood. Discusses secretion of tears when eye muscles are involuntarily contracted.

Author:  Charles Robert Darwin
Addressee:  Frans Cornelis (Franciscus Cornelius) Donders
Date:  3 June [1870]
Classmark:  American Philosophical Society (Mss.B.D25.)
Letter no:  DCP-LETT-7215

To F. C. Donders   21 June 1870

Summary

Comments on translation of FCD’s paper ["On the action of the eyelids", Arch. Med. 5 (1870): 20–38].

Speculates that closing eyelids may protect eyes from vibrations.

Discusses publication of Expression.

Author:  Charles Robert Darwin
Addressee:  Frans Cornelis (Franciscus Cornelius) Donders
Date:  21 June 1870
Classmark:  American Philosophical Society (Mss.B.D25.)
Letter no:  DCP-LETT-7238
Document type
letter (7)
Addressee
Correspondent
Date
1870
05 (5)
06 (2)
letter