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From:
Ferdinand von Mueller
To:
Charles Darling
Date:
20 April 1866
Source of text:
National Archives, London, CO 309/78, Victoria, despatches Apr 6-May 7 1866, enclosure to despatch no. 44 of 21 April 1866, ff. 125-8.For a copy of this letter see Royal Geographical Society, London, Archives, Journal mss., Australia, 1867, Mueller, F
Summary:

No summary available.

Contributor:
Correspondence of Ferdinand von Mueller Project
From:
George Biddell Airy
To:
Sir John Herschel
Date:
[20 April 1866]
Source of text:
RS:HS 1.291
Summary:

Further regarding the possible introduction of the metrical system for weights and measures.

Contributor:
John Herschel Project
From:
Charles Robert Darwin
To:
Friedrich Hermann Gustav (Friedrich) Hildebrand
Date:
20 Apr [1866]
Source of text:
Morristown National Historical Park (Lloyd W. Smith MS 698)
Summary:

Is obliged to receive FH’s papers. The cases of Lopezia and Schizanthus are new to him.

In 1860 CD watched Bombus lapidarius sucking the flowers of Pedicularis sylvatica and saw what FH has described.

Has not yet read the paper on Salvia.

Contributor:
Darwin Correspondence Project
From:
Maxwell Tylden Masters
To:
Charles Robert Darwin
Date:
20 Apr 1866
Source of text:
DAR 171: 75
Summary:

Expects R. Caspary’s paper to be published soon.

Reports the conclusions of another of RC’s papers on the movement of tree branches due to cold [Bull. Congr. Int. Bot. & Hortic. Lond. (1866): 98–117]

and discusses a paper by H. Lecoq on the mountain flora of the Auvergne [Proc. Bot. Congr. (1866): 158–65]. He disagrees with CD on glaciation and its effect on geographical distribution.

Contributor:
Darwin Correspondence Project
From:
Sir John Herschel
To:
George Biddell Airy
Date:
[20 April 1866]
Source of text:
RGO 6.412.158
Summary:

Comments on the quality of the star catalogue of Charles Rümker [see John Wrottesley's 1866-4-16].

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
George Biddell Airy
Date:
[20 April 1866]
Source of text:
RGO 6.15.110
Summary:

Comments on William Whewell's replacement on the Royal Observatory's Board of Visitors.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
George Biddell Airy
Date:
[20 April 1866]
Source of text:
RGO 6.359.240
Summary:

Inquires of GA as to the current status of parliamentary moves to introduce the metric system into Britain [see GA's 1864-9-28].

Contributor:
John Herschel Project
From:
Sir Joseph Dalton Hooker
To:
General William Munro
Date:
20 April 1866
Source of text:
MUN/1 f.128, The Royal Botanic Gardens, Kew
Summary:

No summary available.

Contributor:
Hooker Project