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Darwin Correspondence Project
1872::11::01 in date [X]
1872::11::01 in date [X]
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To George King   November 1872


Obliged for letter on worm-castings. Asks GK to observe them in southern Europe.

Author:  Charles Robert Darwin
Addressee:  George King
Date:  Nov 1872
Classmark:  DAR 146: 13
Letter no:  DCP-LETT-8589

To Amy Ruck   [1 November 1872]



Sends a copy of Expression and his autograph.

Author:  Charles Robert Darwin
Addressee:  Amy Richenda (Amy) Ruck; Amy Richenda (Amy) Darwin
Date:  [1 Nov 1872]
Classmark:  DAR 185: 48
Letter no:  DCP-LETT-8590

To S. H. Haliburton   1 November [1872]



Sends a copy of Expression

and speaks fondly of his memories of Woodhouse and the Owen family.

Author:  Charles Robert Darwin
Addressee:  Sarah Harriet Mostyn Owen; Sarah Harriet Williams; Sarah Harriet Haliburton
Date:  1 Nov [1872]
Classmark:  DAR 185: 22
Letter no:  DCP-LETT-8591

From Alpheus Hyatt   [late] November 1872


No need to apologise for not quoting AH’s paper on acceleration and retardation.

Agassiz introduced AH to ammonites and entrusted collection to him. Has followed developmental history of each species and placed them within geological formations. Found evolutionary history of species recapitulated only to a degree in individual development. Stages frequently skipped. Explains why young of later animals are like adults that preceded them. Retardation entirely idea of Edward Drinker Cope. Sends paper to explain it. Acceleration can explain degraded forms. Often like youthful stage with which series began. Often resemble old age of earlier series. Regularity of these series incompatible with natural selection. How can selection account for degraded final stages or for predictability of development? Franz Hilgendorf’s Paludinae from Steinheim lake show same parallelism in development. May be possible to reconcile this with selection. But Trochiformis begins to show degradation in beds where it is most numerous and has largest individuals, i.e., where selection seems to be favouring it. Will work on Steinheim shells this winter.

Author:  Alpheus Hyatt
Addressee:  Charles Robert Darwin
Date:  [late] Nov 1872
Classmark:  DAR 99: 48–55
Letter no:  DCP-LETT-8655