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Darwin Correspondence Project

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To J. D. Hooker 6 August 1881

Responds to JDH’s outline history of plant geography.

Considers Humboldt the "greatest scientific traveller who ever lived".

Discusses the origin and rapid radiation of angiosperms in Cretaceous period.

Comments on importance of work of Alphonse de Candolle, Saporta, Axel Blytt.

… 11; for his earlier discussions with Hooker on the subject, see Correspondence vol. 6, letters to J. D. Hooker, 13 …

Is making final preparations for his address [at York BAAS meeting] and questions CD on specific points.

… 13 to 29 August [1881], he recorded the effects of dripping water on leaves of Mimosa pudica and Desmodium at different times of day (DAR 67: 102–4); the symbols denote hours and minutes. ‘ Mimosa pudica … Aug 21 st 10° 30′ a. m—new leaf started’; ‘Desmodium. Aug 21′. 11 …

Darwin, C. R.	(1)
Hooker, J. D.	(1)

Darwin, C. R.	(1)
Hooker, J. D.	(1)

Darwin, C. R.	(2)
Hooker, J. D.	(2)