Search: Maclear, Thomas in correspondent 
letter in document-type 
1830-1839 in date 
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Herschel11883

From:
Thomas Maclear
To:
Sir John Herschel
Date:
23 December [1836]
Source of text:
RS:HS 12.242
Summary:

From a newspaper received today sees that John Pond is dead and buried. Affair of James South and Edward Troughton and William Simms is as before. Sends the observations of the 21st; rain was not good for astronomical observations. Comments on these readings.

Contributor:
John Herschel Project

Herschel11884

From:
Thomas Maclear
To:
Sir John Herschel
Date:
10 November [1836]
Source of text:
RS:HS 12.243
Summary:

Has succeeded in fixing an 18 pounder gun firmly in the ground to mark the western termination of the base-line query on how to measure the meridian of a mountain at sea level. Has requested permission from the Governor to inspect the military orders for 1751-2.

Contributor:
John Herschel Project

Herschel12091

From:
Sir John Herschel
To:
Thomas Maclear
Date:
[23 January 1834]
Source of text:
RS:HS 21.156
Summary:

Matters relating to providing observatory instruments to an expedition into Central Africa.

Contributor:
John Herschel Project

Herschel12092

From:
Sir John Herschel
To:
Thomas Maclear
Date:
[2 March 1834]
Source of text:
RS:HS 21.158
Summary:

Informs TM that JH's 20-ft. telescope is fully in operation; invites TM to come and observe with it.

Contributor:
John Herschel Project

Herschel12093

From:
Sir John Herschel
To:
Thomas Maclear
Date:
1] June [1834
Source of text:
RS:HS 21.161
Summary:

JH will break his rule about never going out when it is possible to sweep the sky, and dine with TM; will offer some help over mural circle problems.

Contributor:
John Herschel Project

Herschel12094

From:
Sir John Herschel
To:
Thomas Maclear
Date:
[12 October 1834]
Source of text:
RS:HS 21.163
Summary:

Comments on social matters, and on what JH has been observing.

Contributor:
John Herschel Project

Herschel12095

From:
Sir John Herschel
To:
Thomas Maclear
Date:
15] January [1835
Source of text:
RS:HS 21.165
Summary:

Describing JH's observations and comparing notes.

Contributor:
John Herschel Project

Herschel12096

From:
Sir John Herschel
To:
Thomas Maclear
Date:
[22 January 1835]
Source of text:
RS:HS 21.169
Summary:

Responds to TM's query in his 1835-1-17 about the effect that motion of the center of the mural circle would have on the microscopic readings.

Contributor:
John Herschel Project

Herschel12097

From:
Sir John Herschel
To:
Thomas Maclear
Date:
[7 February 1835]
Source of text:
RS:HS 21.171
Summary:

Additional approaches to resolving TM's mural circle problem [see JH's 1835-2-5].

Contributor:
John Herschel Project

Herschel12098

From:
Sir John Herschel
To:
Thomas Maclear
Date:
[23 February 1835]
Source of text:
RS:HS 21.172
Summary:

More on the mural circle [see JH's 1835-2-7].

Contributor:
John Herschel Project

Herschel12099

From:
Sir John Herschel
To:
Thomas Maclear
Date:
[16 March 1835]
Source of text:
RS:HS 21.173
Summary:

Some comments about constant error in TM's observations.

Contributor:
John Herschel Project

Herschel12100

From:
Sir John Herschel
To:
Thomas Maclear
Date:
[14 April 1835]
Source of text:
RS:HS 21.174
Summary:

About the difficulty of measuring high and low tide with the instruments available to TM; offers the design of an instrument that would measure the mid-point between high and low tides.

Contributor:
John Herschel Project

Herschel12101

From:
Sir John Herschel
To:
Thomas Maclear
Date:
[29 May 1835]
Source of text:
RS:HS 21.176
Summary:

Excited about JH's observations, and has shown them to several people.

Contributor:
John Herschel Project

Herschel12102

From:
Sir John Herschel
To:
Thomas Maclear
Date:
[8 July 1835]
Source of text:
RS:HS 21.180
Summary:

Sends TM some tide observations, and some calculations done on them.

Contributor:
John Herschel Project

Herschel12103

From:
Sir John Herschel
To:
Thomas Maclear
Date:
1] September [1835
Source of text:
RS:HS 21.183
Summary:

Believes that TM is the first to see the return of Halley's Comet [see TM's 1835-9-1].

Contributor:
John Herschel Project

Herschel12104

From:
Sir John Herschel
To:
Thomas Maclear
Date:
26] October [1835
Source of text:
RS:HS 21.184
Summary:

Still struggling with the problems inherent in using the mural circle; the comet has apparently been seen by JH's mechanic, John Stone, prior to having been sighted by TM.

Contributor:
John Herschel Project

Herschel12105

From:
Sir John Herschel
To:
Thomas Maclear
Date:
13] September [1835
Source of text:
RS:HS 21.185
Summary:

Sends information about where to look for Encke's comet.

Contributor:
John Herschel Project

Herschel12106

From:
Sir John Herschel
To:
Thomas Maclear
Date:
[1835-9-20 or 21]
Source of text:
RS:HS 21.186
Summary:

Has not had any success in finding comets.

Contributor:
John Herschel Project

Herschel12107

From:
Sir John Herschel
To:
Thomas Maclear
Date:
[23 October 1835]
Source of text:
RS:HS 25.4.15 (C: RS:HS 21.189)
Summary:

Is intrigued by the apparent displacement of several planetary nebulae from the positions found in the catalogues of other observers. Does not know what to think.

Contributor:
John Herschel Project

Herschel12108

From:
Sir John Herschel
To:
Thomas Maclear
Date:
22] September [1835
Source of text:
RS:HS 21.190
Summary:

JH is chagrined to note that he forgot to observe the equinox, after having impressed on any and all the need to do so.

Contributor:
John Herschel Project
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