Observations on a bird that used a stone to break open a snail.
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Observations on a bird that used a stone to break open a snail.
Thanks for WT’s papers, especially ["The present aspect of the doctrine of cellular pathology", Edinburgh Med. J. 8 (1863): 873–97].
Thinks of adding chapter on man to Variation. Asks about muscles connected to os coccyx in man and existence of other rudimentary organs in man.
Sends copy of Origin.
Thanks WT for information about rudimentary parts in man.
Requests information about rudimentary muscles and organs in man. Asks about marrow of os coccyx, and about testes and ovaria in early embryos of both sexes.
Thanks for information about rudimentary organs. Asks about rudimentary character of human hair and panniculus carnosus.
On muscles in man for moving skin, hair, ears, etc.
Thanks WT for information.
Will not include chapter on man in Variation but plans separate essay in future.
On the development of the mammae and the glands of the skin. R. A. v. Kölliker and Carl von Langer are the authorities [See Descent 1: 209].
Extract from Robert Knox on hermaphroditism [Lond. Med. Gaz. 12 Jan 1844].
Discusses errors in Descent. Not surprised that WT is not committed to full acceptance of evolution of man.
At work on Expression. Asks about muscles that raise spines of hedgehog and tail coverts of peacock. Asks about influence of mind on capillaries with regard to blushing. Mentions views of James Paget on influence of the mind on nutrition of body parts.
Note on errata in first volume of Descent.
Comments on influence of nervous system on nutrition of body parts as discussed in James Paget’s Lectures on surgical pathology [delivered at the Royal College of Surgeons of England, 3d ed. (1870)]. Asks about mental influence on capillary circulation.
Sends £10 subscription for James Murie.