Showing 21–40 of 72 items
The Charles Darwin Collection
The Darwin Correspondence Project is publishing letters written by and to the naturalist Charles Darwin (1809–1882). Complete transcripts of letters are being made available through the Project’s website (www.darwinproject.ac.uk) after publication in the ongoing print edition of The Correspondence of Charles Darwin (Cambridge University Press 1985–). Metadata and summaries of all known letters (c. 15,000) appear in Ɛpsilon, and the full texts of available letters can also be searched, with links to the full texts.
Proportion of sexes in ruffs [see Descent 1: 306].
Colour display in linnets, songbirds. Courtship display of Australian pigeon at zoo.
Starlings find new mates readily. Nesting in threes common.
Recognition of song by birds.
Answers CD’s question on whether any female birds regularly sing.
Plumage of canaries; changes in plumage with successive moults.
Coloration of linnets.
Sexual behaviour of black hen bullfinch.
Both sexes of Crossoptilon auritum (eared pheasant) obtained the red cheeks the first year.
Coloration of the linnet.
South Down sheep: variability in colouring and patterning of lambs compared with constancy of adult coat.
Migratory male nightingales and blackcaps arrive before females [see Descent 1: 259].
Discusses chaffinch "Peggers".
Disagrees with CD’s opinion that canary mules are fertile.
Display of colour of greenfinches in courtship.
Loss of juvenile colouring in South Down sheep.
Describes the unusual appearance of a horse whose mother had previously borne a foal by a quagga. The effect of one mating on the subsequent pregnancy of another mating is explained by JJW using Pangenesis.
On behaviour of birds when frightened and when threatening.
Purple Cytisus grafted onto yellow stock produces some yellow flowers.
Mutations in rabbits.
Cites case of variegated leaf form of one plant apparently spreading to a neighbour.
On mutations in rabbits.
Cytisus case is not a double graft.
Aggressive behaviour of birds of prey.
On variegated leaves; a feature not inherited consistently.
Hostility of birds toward others with same colour;
nuptial plumage.
Spiza cyanea and Spiza ciris.
Hybrid Motacilla.
Case of female duck leaving mate to pair with male of another species.
Discusses case of Cytisus graft described by JJW.
Is very interested in JJW’s report on a purple laburnum grafted onto yellow stock which then produces yellow flowers. CD requests racemes to examine.
Regarding Cytisus graft with yellow flowers, CD thinks nurseryman has sold Cytisus adami to JJW’s brother in place of C. purpureus. This explains apparent "sport". [P.S. on envelope:] C. purpureus seeds freely. C. adami never does.
JJW is to think no more about mistake [regarding Cytisus graft].
E. Ray Lankester blackballed by Linnean Society. Another election planned. Would JJW use his influence in Lankester’s favour?