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To J. W. Clark   9 February 1875

Summary

Thanks for information about effect of fear on the iris.

Author:  Charles Robert Darwin
Addressee:  Joseph Warner Clark
Date:  9 Feb 1875
Classmark:  University of California, Berkeley, The Bancroft Library (BANC MSS 74/78 z)
Letter no:  DCP-LETT-9847

From J. W. Clark   25 June 1875

Summary

Observations of fear in animals marked by dilation of pupils.

Author:  Joseph Warner Clark
Addressee:  Charles Robert Darwin
Date:  25 June 1875
Classmark:  DAR 161: 154
Letter no:  DCP-LETT-10030

From J. W. Clark   16 September 1875

Summary

Examples of pupillary dilation.

Author:  Joseph Warner Clark
Addressee:  Charles Robert Darwin
Date:  16 Sept 1875
Classmark:  DAR 161: 155
Letter no:  DCP-LETT-10158

From J. W. Clark   8 September 1877

Summary

An example of inheritance confined to one sex.

Author:  Joseph Warner Clark
Addressee:  Charles Robert Darwin
Date:  8 Sept 1877
Classmark:  DAR 161: 156
Letter no:  DCP-LETT-11131
Document type
letter (4)
Correspondent
Clark, J. W. (b)[X]
Darwin, C. R.[X]
Date
1875 (3)
1877 (1)
letter