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DCP-LETT-587

From:
Charles Robert Darwin
To:
George Robert Gray
Date:
[Feb 1841]
Source of text:
The British Library (Egerton MS 2348: 239)
Summary:

In a revise [of Birds] CD has altered "Colaptes Chilensis Vigors" to "Chrysoptilus Chilensis G. R. Gray". Is that right?

Contributor:
Darwin Correspondence Project

DCP-LETT-587F

From:
George Edmundson Bearpark
To:
Charles Robert Darwin
Date:
12 Feb 1841
Source of text:
Geological Society of London (GSL/L/R/6/126)
Summary:

Requesting information about membership of the Geological Society of London.

Contributor:
Darwin Correspondence Project

DCP-LETT-589

From:
Charles Robert Darwin
To:
George Robert Gray
Date:
[Feb–Mar 1841]
Source of text:
The British Library (Egerton MS 2348: 240)
Summary:

Sends proof of index of final number of Birds for checking.

Contributor:
Darwin Correspondence Project

DCP-LETT-590

From:
Charles Robert Darwin
To:
Charles Lyell, 1st baronet
Date:
[21 Feb – 4 Apr 1841]
Source of text:
American Philosophical Society (Mss.B.D25.26)
Summary:

Answers a number of queries from Lyell concerning geography and geology of Chiloé Island and its relationship to the Cordilleras.

Asks about "perched rocks" on Jura and notes their relevance to Louis Agassiz’s theory. Discusses Agassiz’s view on Jura.

Mentions seeing Robert Brown.

Notes R. I. Murchison’s discovery of shells in central England.

Weakness of negative evidence.

Contributor:
Darwin Correspondence Project

Herschel10624

From:
Luke Howard
To:
Sir John Herschel
Date:
[1 February 1841]
Source of text:
RS:HS 10.5
Summary:

Has been considering the reasons for the great depression of the barometer in November 1840. Thinks JH may be interested in the enclosed essay. Would be pleased if it could be read to the Royal Society.

Contributor:
John Herschel Project

Herschel10737

From:
Sir John Herschel
To:
Robert Hunt
Date:
[10 February 1841]
Source of text:
RS:HS 22.79
Summary:

Has not lately done much work in photography, except to work with paper treated with vegetable substances.

Contributor:
John Herschel Project

Herschel11955

From:
Sir John Herschel
To:
Macedonio Melloni
Date:
[23 February 1841]
Source of text:
RS:HS 12.317 & 22.80
Summary:

Will do all in his power to ensure that MM receives copies of the publications relating to the Fixed Observatories. Does not think MM could have seen a copy of JH's paper on photographic action when he wrote the notice in Annales de chimie. Comments on this paper and more recent experiments in this field.

Contributor:
John Herschel Project

Herschel1733

From:
George Biddell Airy
To:
Sir John Herschel
Date:
[8 February 1841]
Source of text:
TxU:H/M-0627.2
Summary:

A notice of meeting of the Standards Commission.

Contributor:
John Herschel Project

Herschel1734

From:
George Biddell Airy
To:
Sir John Herschel
Date:
[8 February 1841]
Source of text:
TxU:H/M-0627.3
Summary:

A note to accompany a draft of the report of the Standards Commission.

Contributor:
John Herschel Project

Herschel1735

From:
George Biddell Airy
To:
Sir John Herschel
Date:
[12 February 1841]
Source of text:
TxU:H/M-0627.4
Summary:

A notice of meeting of the Standards Commission.

Contributor:
John Herschel Project

Herschel1736

From:
George Biddell Airy
To:
Sir John Herschel
Date:
[17 February 1841]
Source of text:
TxU:H/M-0627.5 (C: RGO 6.340.298b)
Summary:

Asks JH to put in writing proposals JH had made at a Standards Commission meeting, especially those relating to nomenclature [see GA's 1841-2-8].

Contributor:
John Herschel Project

Herschel2465

From:
Edward Sabine
To:
Sir John Herschel
Date:
7 February [1841?]
Source of text:
RS:HS 15.319
Summary:

Will be happy to send particulars from [C. F.] Gauss's information. [Humphrey] Lloyd's instrument records changes in horizontal intensity best. Wants to employ magnetometers in New York.

Contributor:
John Herschel Project

Herschel2843

From:
Edward Sabine
To:
Sir John Herschel
Date:
[5 February 1841]
Source of text:
RS:HS 15.123
Summary:

Has learned of the availability of a house at Kew, which could be used as a magnetic and meteorological observatory. Dr. Robinson has received the instruments.

Contributor:
John Herschel Project

Herschel2844

From:
Edward Sabine
To:
Sir John Herschel
Date:
[20 February 1841]
Source of text:
RS:HS 15.124
Summary:

Francis Beaufort will send JH sheets from James Ross covering trip from the Cape to Van Diemen's Land. Laments Charles Riddell's leave of absence but acknowledges replacement Lieutenant Younghusband's skill. States that C. F. Gauss has informed him by letter of the location of the south magnetic pole. Informs of [Edward] Belcher's letter concerning various magnetic stations in the South Pacific.

Contributor:
John Herschel Project

Herschel2859

From:
Edward Sabine
To:
Sir John Herschel
Date:
[2 February 1841]
Source of text:
RS:HS 15.139
Summary:

Encloses letter from G. B. Airy. Suggests new method of magnetic observation.

Contributor:
John Herschel Project

Herschel2860

From:
Edward Sabine
To:
Sir John Herschel
Date:
[5 February 1841]
Source of text:
RS:HS 15.140
Summary:

Presents data on various disturbances. Awaits advice from C. F. Gauss. Discusses determination of intervals between observations. Mentions proposal to continue observations for 3 years.

Contributor:
John Herschel Project

Herschel2861

From:
Sir John Herschel
To:
Edward Sabine
Date:
[9 February 1841]
Source of text:
RS:HS 15.141 (C: RS:HS 22.111)
Summary:

Advice for standardizing observations, to be given to the Physical Committee of the R.S.L.

Contributor:
John Herschel Project

Herschel2862

From:
Edward Sabine
To:
Sir John Herschel
Date:
[24 February 1841]
Source of text:
RS:HS 15.142
Summary:

On discrepancy of data from G. B. Airy and Humphrey Lloyd. Captain Boileau and John Caldecott exchange instruments to normalize data. Will send letters from Airy, [A. T.] Kupffer, Lloyd, ES, and JH to John Lubbock and the R.S.L. Council concerning the discrepancies.

Contributor:
John Herschel Project

Herschel3845

From:
Caroline Lucretia Herschel
To:
Sir John Herschel
Date:
[24 February 1841]
Source of text:
unknown
Summary:

Angry that many call William Herschel's 40-ft. reflecting telescope 'useless.'

Contributor:
John Herschel Project

Herschel3947

From:
Sir John Herschel
To:
Robert Hunt
Date:
[20 February 1841]
Source of text:
George Eastman House, 5.17
Summary:

Unable to give any specifics concerning Louis Jacques Mandé Daguerre's new photographic process. Discovered that old paper specimens produced a much better representation of the spectrum in its natural colors than those obtained at the date of JH's paper; these results are 'light on a dark ground,' which makes JH more hopeful that colored photography will someday be perfected. Has experimented with vegetable substances.

Contributor:
John Herschel Project
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