Search: Maclear, Thomas in addressee 
Herschel, John in correspondent 
1830-1839 in date 
letter in document-type 
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Showing 41–60 of 134 items

Herschel12116

From:
Sir John Herschel
To:
Thomas Maclear
Date:
[31 March 1836]
Source of text:
RS:HS 21.204
Summary:

Sending some equipment back and forth, and some astrometer readings.

Contributor:
John Herschel Project

Herschel12117

From:
Sir John Herschel
To:
Thomas Maclear
Date:
21] April [1836
Source of text:
RS:HS 21.205
Summary:

Sends observations of several more standard stars, and of the comet.

Contributor:
John Herschel Project

Herschel12118

From:
Sir John Herschel
To:
Thomas Maclear
Date:
3] September [1836
Source of text:
RS:HS 21.209
Summary:

Sends formulae for dealing with the apparent differences, in viewing the comet and compared star, due to the effects of parallax and refraction.

Contributor:
John Herschel Project

Herschel12119

From:
Sir John Herschel
To:
Thomas Maclear
Date:
[19 September 1836]
Source of text:
RS:HS 21.210
Summary:

Calms TM about not having his comet observations published yet; those published so far are not of much value.

Contributor:
John Herschel Project

Herschel12120

From:
Sir John Herschel
To:
Thomas Maclear
Date:
22] August [1836
Source of text:
RS:HS 21.215
Summary:

A note along with a request from Niccolo Cacciatore for some observations that JH says he cannot make.

Contributor:
John Herschel Project

Herschel12121

From:
Sir John Herschel
To:
Thomas Maclear
Date:
[1 February 1837]
Source of text:
RS:HS 21.217
Summary:

Comments on disagreements in stellar observations and on sun spot activity; and requests observations of a specific star.

Contributor:
John Herschel Project

Herschel12122

From:
Sir John Herschel
To:
Thomas Maclear
Date:
[5 May 1837]
Source of text:
RS:HS 21.220
Summary:

About the observation of sun spots and the second satellite of Saturn.

Contributor:
John Herschel Project

Herschel12123

From:
Sir John Herschel
To:
Thomas Maclear
Date:
[8 June 1837]
Source of text:
RS:HS 21.222
Summary:

About a variety of observations that JH has made.

Contributor:
John Herschel Project

Herschel12124

From:
Sir John Herschel
To:
Thomas Maclear
Date:
[6 July 1837]
Source of text:
RS:HS 21.223
Summary:

About some observations, the weather, and the difficulty of establishing tide observations, given the slowness of the Admiralty.

Contributor:
John Herschel Project

Herschel12125

From:
Sir John Herschel
To:
Thomas Maclear
Date:
[30 July 1837]
Source of text:
RS:HS 21.226
Summary:

Sends TM his nebulae observations and drawings of what he saw.

Contributor:
John Herschel Project

Herschel12126

From:
Sir John Herschel
To:
Thomas Maclear
Date:
[3 December 1837]
Source of text:
RS:HS 21.232
Summary:

Talks about the very hot weather, and some matters of business that JH needs to work out with TM.

Contributor:
John Herschel Project

Herschel12127

From:
Sir John Herschel
To:
Thomas Maclear
Date:
[16 December 1837]
Source of text:
RS:HS 21.233
Summary:

About the remarkably bright variable star, Eta Argus.

Contributor:
John Herschel Project

Herschel12128

From:
Sir John Herschel
To:
Thomas Maclear
Date:
12] September [1837
Source of text:
RS:HS 21.236
Summary:

Sees little benefit in trying to triangulate between stations, certainly at this time; JH's mirror polishing has been very successful.

Contributor:
John Herschel Project

Herschel12129

From:
Sir John Herschel
To:
Thomas Maclear
Date:
8] November [1837
Source of text:
RS:HS 21.237
Summary:

Compares his observations for some stars with the observations of TM.

Contributor:
John Herschel Project

Herschel12130

From:
Sir John Herschel
To:
Thomas Maclear
Date:
13] December [1837
Source of text:
RS:HS 21.238
Summary:

Some minor matters of astronomical business followed by an extended list of principles on which a constellation reform might be undertaken.

Contributor:
John Herschel Project

Herschel12131

From:
Sir John Herschel
To:
Thomas Maclear
Date:
[16 January 1838]
Source of text:
RS:HS 21.239
Summary:

JH is preparing to bring his observations at the Cape to a close; has polished a mirror for TM.

Contributor:
John Herschel Project

Herschel12132

From:
Sir John Herschel
To:
Thomas Maclear
Date:
[21 January 1838]
Source of text:
RS:HS 21.240
Summary:

On the variability of Alpha Hydrae and some other stars.

Contributor:
John Herschel Project

Herschel12133

From:
Sir John Herschel
To:
Thomas Maclear
Date:
[3 February 1838]
Source of text:
RS:HS 21.241
Summary:

Urges against carrying up Table Mountain the zenith sector sent to TM to check N. L. Lacaille's measurement of a degree of terrestrial longitude. Comments on JH's skill with precision instruments.

Contributor:
John Herschel Project

Herschel12134

From:
Sir John Herschel
To:
Thomas Maclear
Date:
1838-3[-7]
Source of text:
RS:HS 21.244
Summary:

Final arrangements before JH and family depart for England.

Contributor:
John Herschel Project

Herschel12837

From:
Sir John Herschel
To:
Thomas Maclear
Date:
[20 February 1836]
Source of text:
TxU:H/L-0241; Reel 1054 (Cdraft: RS:HS 25.15.2)
Summary:

Having read John Burrow's book, JH proposes procedure for analyzing masses of data from [African] Expedition. Will volunteer to interpolate chronometer errors if TM will undertake computations.

Contributor:
John Herschel Project
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