Search: Herschel, John in author 
1830-1839::1836 in date 
letter in document-type 
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Herschel3926

From:
Sir John Herschel
To:
Thomas Maclear
Date:
[2 April 1836]
Source of text:
unknown
Summary:

Arranges to have tea with TM tomorrow at the Royal Observatory.

Contributor:
John Herschel Project

Herschel3927

From:
Sir John Herschel
To:
Thomas Maclear
Date:
[10 May 1836]
Source of text:
C: RS:HS 21.206 inc
Summary:

Asks TM to accompany himself and Daniel Cloetes in hunting a leopard.

Contributor:
John Herschel Project

Herschel3928

From:
Sir John Herschel
To:
Thomas Maclear
Date:
[24 May 1836]
Source of text:
unknown
Summary:

Does not want to compute precessions for each individual star.

Contributor:
John Herschel Project

Herschel3929

From:
Sir John Herschel
To:
Thomas Maclear
Date:
[19 July 1836]
Source of text:
unknown
Summary:

Notes a discrepancy in TM's latest observations and those of Thomas Brisbane.

Contributor:
John Herschel Project

Herschel3930

From:
Sir John Herschel
To:
Thomas Maclear
Date:
25] July [1836
Source of text:
unknown
Summary:

Congratulates TM on the birth of his son, George.

Contributor:
John Herschel Project

Herschel3931

From:
Sir John Herschel
To:
Thomas Maclear
Date:
[26 August 1836]
Source of text:
unknown
Summary:

Inquires about a star not found in TM's list of comet stars. Believes that their comet collaboration is going well.

Contributor:
John Herschel Project

Herschel3933

From:
Sir John Herschel
To:
Thomas Maclear
Date:
8] September [1836
Source of text:
unknown
Summary:

Discusses their table of comet stars.

Contributor:
John Herschel Project

Herschel3934

From:
Sir John Herschel
To:
Thomas Maclear
Date:
28] September [1836
Source of text:
unknown
Summary:

Wants to reset his barometer by TM's.

Contributor:
John Herschel Project

Herschel3935

From:
Sir John Herschel
To:
Thomas Maclear
Date:
12] October [1836
Source of text:
unknown
Summary:

Compares JH's and TM's barometric readings. Criticizes Pierre Morin's work.

Contributor:
John Herschel Project

Herschel3937

From:
Sir John Herschel
To:
Thomas Maclear
Date:
[17 December 1836]
Source of text:
unknown
Summary:

Setting a unit of measurement for solar radiation (the 'actine'); proposes to 'take for a unit of solar heat that which if all employed in heating a cubic inch of water exposing a horizontal surface of one square inch, to a vertical Sun during one minute would produce a dilation of one thousandth part of its volume.'

Contributor:
John Herschel Project

Herschel3938

From:
Sir John Herschel
To:
Thomas Maclear
Date:
20] December [1836
Source of text:
unknown
Summary:

Testing whether an actinometer with a glass back is more accurate than one without.

Contributor:
John Herschel Project

Herschel3980

From:
Sir John Herschel
To:
Caroline Lucretia Herschel
Date:
[8 March 1836]
Source of text:
TxU:H/L-0581.1.b; Reel 1058
Summary:

Is too busy to use Carl Gauss's magnetometer. Viewing Halley's Comet has interrupted JH's sweeps. Reports that Gamma Virginis is a single star in both the 20-ft. reflector and 7-ft. equatorial.

Contributor:
John Herschel Project

Herschel3981

From:
Sir John Herschel
To:
Caroline Lucretia Herschel
Date:
[19 February 1836]
Source of text:
TxU:H/L-0581.2.b; Reel 1058
Summary:

Reports the birth of his fifth child, Alexander Stewart. Has made some excellent observations of Halley's Comet. Asks CH to inform Carl Gauss that JH has not received Gauss's magnetometer nor is JH certain of how to use it.

Contributor:
John Herschel Project

Herschel3982

From:
Sir John Herschel
To:
Caroline Lucretia Herschel
Date:
1836-[8]
Source of text:
TxU:H/L-0581.3.b; Reel 1058
Summary:

Work nearly finished here. Has documented the sixth satellite of Saturn and has seen possibly a seventh.

Contributor:
John Herschel Project

Herschel3983

From:
Sir John Herschel
To:
Caroline Lucretia Herschel
Date:
[3 October 1836]
Source of text:
TxU:H/L-0581.4.b; Reel 1058
Summary:

Confident that 1837 will be his last year in Africa. JH's catalog of nebulae and double stars is nearly complete. Has a series of observations of Halley's Comet from 1836-1-25 to 1836-5-5. Although JH is too busy to undertake any magnetic studies, he has been providing information about Carl Gauss's magnetometer to the new observatory in Bombay. Recalls that Charles Babbage mentioned the 'principle' of Gauss's method 'at least 10 or 12 years' ago.

Contributor:
John Herschel Project

Herschel4008

From:
Sir John Herschel
To:
Thomas Maclear
Date:
4] June [1836
Source of text:
unknown
Summary:

Thanks TM for restoring JH's micrometer.

Contributor:
John Herschel Project

Herschel4009

From:
Sir John Herschel
To:
Thomas Maclear
Date:
[1836-7?]
Source of text:
unknown
Summary:

Believes that JH and TM can compile a better comet catalog together than they could separately.

Contributor:
John Herschel Project

Herschel4157

From:
Sir John Herschel
To:
William Henry Smyth
Date:
[31 May 1836]
Source of text:
RS:HS 21.207
Summary:

Thanks WS for having accepted his medal from R.A.S. Finds that the [Thomas] Brisbane Catalogue contains insufficient right ascension information, complicating reduction observations. Observed Halley's Comet.

Contributor:
John Herschel Project

Herschel6006

From:
Sir John Herschel
To:
Francis Baily
Date:
[27 February 1836]
Source of text:
RS:HS 3.132
Summary:

Regarding the double star Gamma Virginis.

Contributor:
John Herschel Project

Herschel6524

From:
Sir John Herschel
To:
Edward Joshua Cooper
Date:
[28 April 1836]
Source of text:
RS:HS 21.202
Summary:

About observations of Halley's Comet. [In postscript dated 1836-5-3], describes further observations of the comet.

Contributor:
John Herschel Project
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