From:
John Jenner Weir
To:
Charles Robert Darwin
Date:
[before 18 June 1868]
Source of text:
DAR 84.1: 141–2
Summary:
Coloration of linnets.
Sexual behaviour of black hen bullfinch.
Contributor:
Darwin Correspondence Project
From:
John Jenner Weir
To:
Charles Robert Darwin
Date:
[before 17] Oct 1868
Source of text:
DAR 86: A36, 53; DAR 84.1: 139
Summary:
Both sexes of Crossoptilon auritum (eared pheasant) obtained the red cheeks the first year.
Coloration of the linnet.
Contributor:
Darwin Correspondence Project
From:
John Jenner Weir
To:
Charles Robert Darwin
Date:
[1–13] May 1869
Source of text:
DAR 181: 79
Summary:
South Down sheep: variability in colouring and patterning of lambs compared with constancy of adult coat.
Contributor:
Darwin Correspondence Project
From:
John Jenner Weir
To:
Charles Robert Darwin
Date:
26 May 1869
Source of text:
DAR 86: A52a-c, DAR 84.1: 143
Summary:
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.
Contributor:
Darwin Correspondence Project
From:
John Jenner Weir
To:
Charles Robert Darwin
Date:
June 1869
Source of text:
DAR 181: 80
Summary:
Loss of juvenile colouring in South Down sheep.
Contributor:
Darwin Correspondence Project
From:
John Jenner Weir
To:
Charles Robert Darwin
Date:
17 Mar 1870
Source of text:
DAR 181: 81
Summary:
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.
Contributor:
Darwin Correspondence Project
From:
John Jenner Weir
To:
Charles Robert Darwin
Date:
27 June 1870
Source of text:
DAR 181: 82
Summary:
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.
Contributor:
Darwin Correspondence Project
From:
John Jenner Weir
To:
Charles Robert Darwin
Date:
4 July 1870
Source of text:
DAR 181: 83
Summary:
On mutations in rabbits.
Cytisus case is not a double graft.
Aggressive behaviour of birds of prey.
Contributor:
Darwin Correspondence Project
From:
John Jenner Weir
To:
Charles Robert Darwin
Date:
31 July 1872
Source of text:
DAR 181: 84
Summary:
On variegated leaves; a feature not inherited consistently.
Contributor:
Darwin Correspondence Project
From:
John Jenner Weir
To:
Charles Robert Darwin
Date:
14 Aug 1872
Source of text:
DAR 88: 177–8
Summary:
Hostility of birds toward others with same colour;
nuptial plumage.
Spiza cyanea and Spiza ciris.
Contributor:
Darwin Correspondence Project
From:
John Jenner Weir
To:
Charles Robert Darwin
Date:
13 Nov 1873
Source of text:
DAR 88: 179–80
Summary:
Hybrid Motacilla.
Case of female duck leaving mate to pair with male of another species.
Contributor:
Darwin Correspondence Project
From:
John Jenner Weir
To:
Charles Robert Darwin
Date:
6 July 1875
Source of text:
DAR 181: 85
Summary:
Yellow flowers occurring on a purple Cytisus grafted onto a yellow stock.
Contributor:
Darwin Correspondence Project
From:
John Jenner Weir
To:
Charles Robert Darwin
Date:
7 July 1875
Source of text:
DAR 181: 86
Summary:
Yellow and purple flowers occur on plant grafted with Cytisus purpureus, but only on separate racemes. Only yellow blooms seed.
Contributor:
Darwin Correspondence Project
From:
John Jenner Weir
To:
Charles Robert Darwin
Date:
9 July 1875
Source of text:
DAR 181: 87
Summary:
Sends CD some of the Cytisus, which has produced yellow flowers on a purple graft.
Contributor:
Darwin Correspondence Project
From:
John Jenner Weir
To:
Charles Robert Darwin
Date:
27 Dec 1881
Source of text:
DAR 148: 467
Summary:
Discusses mule’s resemblance to parents.
Contributor:
Darwin Correspondence Project