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Herschel, John in author 
1840-1849::1842::09 in date 
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Herschel6102

From:
Sir John Herschel
To:
Francis Baily
Date:
[1 September 1842]
Source of text:
RS:HS 3.229 (C: RS:HS 25.8.47)
Summary:

Has sent the papers on the eclipse to G. B. Airy.

Contributor:
John Herschel Project

Herschel279

From:
Sir John Herschel
To:
George Biddell Airy
Date:
[1 September 1842]
Source of text:
RGO 6.112.75 (ACCS: RS:HS 25.6.11)
Summary:

About eclipse observations of 1842, together with JH's speculations about the existence of an atmosphere around the sun. Enclosed is an eclipse drawing by Francis Baily.

Contributor:
John Herschel Project

Herschel6668

From:
Sir John Herschel
To:
J[oseph] Cranch
Date:
[1842-9-1 or later]
Source of text:
RS:HS 5.371 (C: RS:HS 25.13.18)
Summary:

Does not feel qualified to judge the merits of the various makes of telescopes. Suggests that the Astronomer Royal may be able to help or one of the other observatories.

Contributor:
John Herschel Project

Herschel3806

From:
Sir John Herschel
To:
Robert Hunt
Date:
1842-9
Source of text:
George Eastman House, 8.17 (C: RS:HS 22.133)
Summary:

Thanks for RH's paper on mineralogy. JH has explored use of mercury together with iron in photography.

Contributor:
John Herschel Project

Herschel11597

From:
Sir John Herschel
To:
Humphrey Lloyd
Date:
[2 September 1842]
Source of text:
RS:HS 22.134
Summary:

Urges some revision in both the report and instructions for the magnetic observations.

Contributor:
John Herschel Project

Herschel8692

From:
Sir John Herschel
To:
Carl Friedrich Gauss
Date:
[4 September 1842]
Source of text:
NSUB Cod.Ms.Gauss 99 (ACCS 2pp RS:HS 25.6.12)
Summary:

The instructions for making magnetic and meteorological observations are to be revised. JH asks CG's advice about this.

Contributor:
John Herschel Project

Herschel3772

From:
Sir John Herschel
To:
Caroline Lucretia Herschel
Date:
[4 September] 1842
Source of text:
TxU:H/L-0587.13; Reel 1058
Summary:

Reports the erection of an obelisk at Feldhausen to commemorate the site of JH's 20-ft. reflector. Back at Cape Town, Thomas Maclear is measuring N. L. Lacaille's Arc of the Meridian. JH received the Prussian Order of Merit.

Contributor:
John Herschel Project

Herschel1071

From:
Sir John Herschel
To:
[George Biddell Airy?]
Date:
[6 September 1842]
Source of text:
RS:HS 25.6.13
Summary:

Remarks on the significant increase in brightness of the star Eta Cygni, and comments on several other variable stars.

Contributor:
John Herschel Project

Herschel8895

From:
Sir John Herschel
To:
Francis Baily
Date:
[6 September 1842]
Source of text:
R.A.S.M.N., 6 (1842), 23-4
Summary:

Calls attention to the increase in magnitude of the star Eta Cygni. Mentions some other variable stars.

Contributor:
John Herschel Project

Herschel1279

From:
Sir John Herschel
To:
Henry Goulburn
Date:
[1842-9-16 or later]
Source of text:
RS:HS B27.51
Summary:

Writes to the Chancellor of the Exchequer to give JH's opinion about the probable utility of continuing to spend money on Charles Babbage's calculating machine.

Contributor:
John Herschel Project

Herschel12645

From:
Sir John Herschel
To:
Mary Baldwin
Date:
[16 September 1842]
Source of text:
TxU:H/L-0065; Reel 1054
Summary:

Birth of JH's ninth child [Julia].

Contributor:
John Herschel Project

Herschel1896

From:
Sir John Herschel
To:
Bridget Taylor
Date:
[17 September 1842]
Source of text:
WT 64710
Summary:

Informs BT of the birth of JH's daughter Julia. Mother and child are both doing well.

Contributor:
John Herschel Project

Herschel3996

From:
Sir John Herschel
To:
Caroline Lucretia Herschel
Date:
[18 September 1842]
Source of text:
TxU:H/L-0587.14; Reel 1058
Summary:

Reports the birth of JH's ninth child, Julia.

Contributor:
John Herschel Project

Herschel467

From:
Sir John Herschel
To:
George Biddell Airy
Date:
[20 September 1842]
Source of text:
RGO 6.427.69
Summary:

Needs some clarification of GA's letter [see GA's 1842-9-16] before JH is ready to reply about the calculating engine.

Contributor:
John Herschel Project

Herschel4720

From:
Sir John Herschel
To:
George Biddell Airy
Date:
[21 September 1842]
Source of text:
RS:HS 1.110 & 22.135
Summary:

Reply to GA's letter on Charles Babbage's calculating machine.

Contributor:
John Herschel Project

Herschel8292

From:
Sir John Herschel
To:
[William Radcliffe Birt]
Date:
[22 September 1842]
Source of text:
RS:HS 19.97
Summary:

Must complete graphs of barometer curves before B.A.A.S. meeting. Did JH mistakenly include 1837 Bogota Almanac in barometer observations?

Contributor:
John Herschel Project

Herschel537

From:
Sir John Herschel
To:
George Biddell Airy
Date:
[23 September 1842]
Source of text:
RGO 6.340.343
Summary:

Gives GA some accounting of standard weights in Britain, and feels that it would be worth acquiring Robinson estate weight [see GA's 1842-9-22].

Contributor:
John Herschel Project

Herschel8293

From:
Sir John Herschel
To:
[William Radcliffe Birt]
Date:
[26 September 1842]
Source of text:
RS:HS 19.98
Summary:

Sends two dozen more papers on barometer graphs. Must have all papers on subject by January. Pleased with WB's lunar observations.

Contributor:
John Herschel Project

Herschel9130

From:
Sir John Herschel
To:
William Whewell
Date:
[29 September 1842]
Source of text:
TC, Camb. Add. Ms.a.20755 (C: RS:HS 22.136)
Summary:

Congratulates WW on a testimonial held in WW's honor in Lancaster. Reports the birth of JH's sixth daughter [Julia].

Contributor:
John Herschel Project
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