Reversion of tamed animals to wild behaviour.
Reversion of tamed animals to wild behaviour.
Pairing habits of birds: polygamy among ducks and canaries.
Information on the proportion of sexes in fowls and other birds.
Questions on marmosets and the vocal organs of Hylobates.
Proportion of sexes in ruffs [see Descent 1: 306].
Colour display in linnets, songbirds. Courtship display of Australian pigeon at zoo.
Answers CD’s objection [see 6121 and 6146] about sexual differences and protective colouring. Summarises his theory of colour in nature.
Sends Ernst Haeckel’s [Generelle] Morphologie [1866] and C. K. Sprengel’s book [Entdeckte Geheimniss der Natur (1793)].
A. Gaudry and L. Rütimeyer have declared in favour of CD’s views.
Measurements of the Bornean ape (Macacus inornatus, Gray). [See Descent 1: 151.]
BDW believes the coloration of species [of Anthocaris] provides a case of sexual selection.
The state of entomology in the U. S.; Darwinism now a common creed, especially among entomologists.
Has read Variation;
is preparing a monograph on Scotch deerhounds. Offers CD information on size of male and female deerhounds.
Might not the effect of human mother’s imagination on "character of offspring" support Pangenesis?
Reports another case of syndactylism.
Requests CD testimonial for Sherardian Professorship of Botany.
Replies to CD’s query on expression of emotions.
Criticism of ARW for too little esteem of the role of sexual selection as agent in giving colour.
Response to other topics.
Cannot judge GWC’s fitness for the Botanical Chair at Oxford. But CD appreciates his work, particularly that on spontaneous generation [Proc. R. Soc. Lond. 13 (1863–4): 313; 14 (1865): 178].
Encloses a testimonial for GWC [see 6162]. Feels himself poorly qualified to give a testimonial for a botanist and apologises for his brevity.
Asks about the ratio of male to female Lepidoptera.
Thanks JJW for his great assistance.
Discusses sexual selection in birds.
Sends queries on secondary sexual characteristics of birds.
Has often marvelled at the different growth of the flowering and creeping branches of ivy.
Thanks CD for testimonial.
AG’s review of Variation [Nation 6 (1868): 234–6] very good.
CD’s fondness for Pangenesis; although an "infant cherished by few", CD expects it to have a long life.
Sends his notes on Florent Prévost’s reference to the habits of the cuckoo.