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To Hubert Airy   5 April [1871]

Summary

Discusses loss of voluntary movement of ears in man and monkey.

Author:  Charles Robert Darwin
Addressee:  Hubert Airy
Date:  5 Apr [1871]
Classmark:  DAR 143: 15
Letter no:  DCP-LETT-7659

To Hubert Airy   10 [December] 1871

Summary

Discusses movement of ears and contraction of the platysma.

Discusses phyllotaxy, citing work of Carl Nägeli and Chauncey Wright.

Author:  Charles Robert Darwin
Addressee:  Hubert Airy
Date:  10 [Dec] 1871
Classmark:  DAR 143: 16
Letter no:  DCP-LETT-8060

From Hubert Airy   3 April 1871

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Summary

Comments on discussion of residual organs in Descent [ch. 1].

Describes his ability to contract the platysma myoides at will.

Suggests reason for loss of voluntary movement of ears in men and monkeys.

Author:  Hubert Airy
Addressee:  Charles Robert Darwin
Date:  3 Apr 1871
Classmark:  DAR 87: 37–8
Letter no:  DCP-LETT-7657

From Hubert Airy   9 December 1871

Summary

Reply to CD’s letter of 5 Apr 1871 [7659], in which he asked HA for further details on when and how platysma myoides contracts.

Replies to CD’s questions about sources on leaf arrangement.

Gives news of speech and paper about CD.

Author:  Hubert Airy
Addressee:  Charles Robert Darwin
Date:  9 Dec 1871
Classmark:  DAR 159: 13
Letter no:  DCP-LETT-8101

From Hubert Airy   12 December 1871

Summary

Thanks for letter and reference to Nägeli’s observations on leaf arrangement in the bud.

Author:  Hubert Airy
Addressee:  Charles Robert Darwin
Date:  12 Dec 1871
Classmark:  DAR 159: 14
Letter no:  DCP-LETT-8105
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