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Herschel, John in author 
1840-1849::1841::02 in date 
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Herschel8367

From:
Sir John Herschel
To:
[William Radcliffe Birt]
Date:
[1841-2?]
Source of text:
RS:HS 19.166
Summary:

Explains 'discordances' as contraction of damp paper. Use 'Engraved Squares' to avoid this error. Possible error in barometer observations from Montreal. Diurnal 'undulation' appearing in data. American observations arrived, may fill 'missing intervals.' Keep record of expenses incurred. Postscript on color variation in stars.

Contributor:
John Herschel Project

Herschel9504

From:
Sir John Herschel
To:
Robert FitzRoy
Date:
[2 February 1841]
Source of text:
RS:HS 7.249
Summary:

Returning some papers that should have been returned earlier. Hopes all are well.

Contributor:
John Herschel Project

Herschel8617

From:
Sir John Herschel
To:
Julian Jackson
Date:
[5 February 1841]
Source of text:
Royal Geographical Society
Summary:

A portable magnetometer purchased by the B.A.A.S. is now available as a loan for use in magnetic survey of British Guyana.

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

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

Herschel836

From:
Sir John Herschel
To:
Margaret Brodie Herschel
Date:
[11 February 1841]
Source of text:
JHS 3.21e
Summary:

It will be difficult for JH to get away to Collingwood as planned as discussions [?] are slow; some family news.

Contributor:
John Herschel Project

Herschel529

From:
Sir John Herschel
To:
George Biddell Airy
Date:
1841-2-17 or later
Source of text:
RGO 6.340.299
Summary:

A note to accompany proposals for the Standards Commission to consider [see GA's 1841-2-17]; twenty pages of proposals are appended.

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

Herschel802

From:
Sir John Herschel
To:
Richarda Airy
Date:
[22 February 1841]
Source of text:
JHS 2.6
Summary:

Writes to announce the birth of daughter Amelia, and to assure RA that both JH's wife, Margaret, and new daughter are doing well.

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

Herschel8645

From:
Sir John Herschel
To:
Peter Mark Roget
Date:
[23 February 1841]
Source of text:
Lion Heart Autographs
Summary:

Notes interest expressed by Macedonio Melloni in meteorological observations. Urges that R.S.L. Council give its attention to the mass of meteorological observations that have accumulated.

Contributor:
John Herschel Project
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