Summary

Replies to F. Delpino’s criticisms of Pangenesis [Sci. Opin. 2 (1869): 365–7, 391–3, 407–8], especially concerning the difficulty of explaining the regrowth of amputated organs.

Summary

Transformism explains rudimentary organs, and teratology, which are otherwise inexplicable.

Looking forward to publication of Descent

and CD’s expected book on "Variation in nature" [see Variation 1: 4].

Summary

He told Giovanni Canestrini that stereotypes [for Variation] would cost £10.

Reminds RC of his suggestion that a copy [of Origin, 5th ed.] be sent to Scientific Opinion for review.

Summary

Comments on Hermann Crüger’s paper, sent by CD, on fertilisation of orchids [J. Linn. Soc. Lond. (Bot.) 8 (1865): 127–35].

Observations on dichogamy in grasses (wheat, rye, barley).

Has not yet read CD’s reply to his article on Pangenesis [Collected papers 2: 158–60].

Summary

On THH’s review [see 7977] of Mivart’s Genesis of species and the Quarterly Review article on Descent.

Summary

Cautions FD about fluid in labellum of Coryanthes.

T. H. Farrer is enthusiastic about FD’s papers.

Believes humming-birds fertilise many American flowers.

Mentions his reply to FD’s criticisms ["Pangenesis: Mr Darwin’s reply to Professor Delpino", Sci. Opin. 2 (1869): 426; Collected papers 2: 158–60].

Suggests that FD study fertilisation of Gramineae.

Summary

No paradox that unimportant characters are important systematically. This view removes heavy burden from CD’s shoulders. Relief that JDH does not object.

Summary

Pleased CD enjoyed his book [Outdoor papers (1871)].

Rejoices at CD’s kindly feelings toward the coloured race.

The Index is in financial trouble due to F. E. Abbot’s unworldliness.

Agassiz is setting up a summer school for natural history off the Massachusetts coast. His pupils develop more liberal scientific opinions than Agassiz’s.

Encloses some notes on expression.

Summary

Glad to know about C.B.

Thinks better of Nature than JDH does.

Likes Academy.

Is reading Anton Kerner on Tubocytisus [in Die Abhängigkeit der Pflanzen von Klima und Boden (1869)].

The genealogical tree reveals the very steps of the formation of the species.

Mlle Royer has brought out a third edition of her translation of the Origin without informing CD, so corrections to fourth and fifth English editions are lost. Has arranged for a new translator of the fifth English edition.

Summary

Sends a translation of two sentences [on floral structure] as requested by Henrietta Darwin.

Summary

Discusses sleep movements of Porlieria.

Has read an abstract of Julius Wiesner on heliotropism and geotropism ["Die heliotropischen Erscheinungen im Pflanzenreiche", Anz. Kais. Akad. Wiss. Wien 15 (1878): 137–40] which seems important but is puzzling.

Gives details of his observations on climbing plants with reference to comments by Julius Sachs.

Summary

Thanks FD for his three publications.

CD is pleased that FD has discussed Pangenesis, although he does not favour the hypothesis. Will seek English publisher.

Summary

Asks JDH to consult colleagues learned in physiology for answer to query: when a large piece of bark is removed from a tree, does the bark ever regrow in isolated points [separate] from the growing margin of the surrounding bark? Query bears on Pangenesis and on power of repair in plants.