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Herschel, John in author 
1840-1849::1842::08 in date 
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Herschel9025

From:
Sir John Herschel
To:
J. Coates
Date:
[8 August 1842]
Source of text:
Univ.Coll.London SDUK Papers
Summary:

[To JC as Secretary, Society for the Diffusion of Useful Knowledge:] Thanks for offer to send a copy of Augustus De Morgan's Differential and Integral Calculus.

Contributor:
John Herschel Project

Herschel3995

From:
Sir John Herschel
To:
Caroline Lucretia Herschel
Date:
[9 August 1842]
Source of text:
TxU:H/L-0587.12.b; Reel 1058
Summary:

Describes the total solar eclipse seen by Francis Baily at Pavia and George Airy at Turin. They were thrilled to witness three purple flames from the blocked sun emerge around the edge of the moon. Thirty more Cape Town sweeps remain to be reduced.

Contributor:
John Herschel Project

Herschel8881

From:
Sir John Herschel
To:
the Athenaeum
Date:
[10 August 1842]
Source of text:
Athenaeum, #773 (Aug. 20, 1842), 748
Summary:

Seeks to clear up confusions about various photographic processes, e.g., the Chrysotype process, developed by JH, about which confusions arose from earlier reports on them in the Athenaeum.

Contributor:
John Herschel Project

Herschel8543

From:
Sir John Herschel
To:
Mr. Collen
Date:
[17 August 1842]
Source of text:
BostonPubLib Ch.J.6.21
Summary:

Would be pleased to be visited by C to discuss the application regarding glass [lenses] of various algebraic formulae devised by JH. Will also show C some of JH's recent work in photography.

Contributor:
John Herschel Project

Herschel175

From:
Sir John Herschel
To:
George Biddell Airy
Date:
[19 August 1842]
Source of text:
RGO 6.693.108
Summary:

Asks GA's opinion as to whether Ordinance observatories should make their magnetic observations on a 3-minute or 5-minute system.

Contributor:
John Herschel Project

Herschel1157

From:
Sir John Herschel
To:
Alexander von Humboldt
Date:
[1842-8-24 or later]
Source of text:
RS:HS 25.14.14
Summary:

Writes to send thanks by way of AH to the King of Prussia for the award of the Order of Merit. JH also comments on some astronomical matters.

Contributor:
John Herschel Project

Herschel11374

From:
Sir John Herschel
To:
Humphrey Lloyd
Date:
[24 August 1842]
Source of text:
RS:HS 11.282 (C: RS:HS 22.137)
Summary:

Regarding the revision of the instructions for the magnetic observatories.

Contributor:
John Herschel Project

Herschel107

From:
Sir John Herschel
To:
George Biddell Airy
Date:
[25 August 1842]
Source of text:
RGO 6.675.329
Summary:

A note to accompany some letters being returned to GA.

Contributor:
John Herschel Project

Herschel176

From:
Sir John Herschel
To:
George Biddell Airy
Date:
[25 August 1842]
Source of text:
RGO 6.693.110 (C: RGO 6.675.327; draft not in JH's hand RS:HS 1.107 & 22.132)
Summary:

Is organizing a committee to revise the instructions for observers at magnetic observatories; GA is on it.

Contributor:
John Herschel Project

Herschel6100

From:
Sir John Herschel
To:
Francis Baily
Date:
[27 August 1842]
Source of text:
RS:HS 3.227 (C: RS:HS 25.6.10 & 25.8.46)
Summary:

Thanks for the information on the eclipse. Comments on this. Events at the B.A.A.S. meeting. News of Wilhelm Struve's activities.

Contributor:
John Herschel Project
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