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From:
Thomas Maclear
To:
Sir John Herschel
Date:
[16 October 1834]
Source of text:
RS:HS 12.96
Summary:

Thanks for the perusal of J. A. Lloyd's paper. Has written to him on the subject of the pendulum. Had only one letter from the Elizabeth. No satisfactory news of [Andrew?] Smith's expedition. Unable to make any circumpolar observations due to the deviation of the transit instrument.

Contributor:
John Herschel Project
From:
Thomas Maclear
To:
Sir John Herschel
Date:
[3 November 1836]
Source of text:
RS:HS 12.97
Summary:

Cornerstone and tree answer admirably. Gives the points in the present triangulation. Lieut. John Williams of the Engineers has promised assistance. There is a French frigate in the harbor, which he intends to visit.

Contributor:
John Herschel Project
From:
Thomas Maclear
To:
Sir John Herschel
Date:
[18 December 1836]
Source of text:
RS:HS 12.98
Summary:

Definition at the Observatory last night was abominable; therefore no comparisons can be made between the stations. Much obliged for the details of the actinometer. Will call on JH later.

Contributor:
John Herschel Project
From:
Thomas Maclear
To:
Sir John Herschel
Date:
25] October [1835
Source of text:
RS:HS 12.99
Summary:

JH's letter is curious regarding the planetary nebulae. Intended to ride over this morning but the heat was too great. Encloses estimate for printing the observations; comments on this. Would like to send it to Francis Beaufort on Tuesday. Returns some papers and journals. C. P. Smyth will call today.

Contributor:
John Herschel Project
From:
Thomas Maclear
To:
Sir John Herschel
Date:
183[8]-1-28
Source of text:
RS:HS 12.100
Summary:

C. P. Smyth will deliver the micrometer series JH lent him for examining the values of the transit level scale; comments on this. Had another peep at the stars JH mentioned and still finds Argus larger than Rigel. The tent fills Mrs. De Witt's yard. She is a friend and correspondent of Charles Grant (Baron Glenelg).

Contributor:
John Herschel Project
From:
Thomas Maclear
To:
Sir John Herschel
Date:
[16 February 1837]
Source of text:
RS:HS 12.101
Summary:

Regrets having to send the observations on so many sheets; those in red ink will be re-observed. John Steuart has given him a note about spots on the sun. Sends Mr. Stebbing's letter and would like JH's comments when he sees him.

Contributor:
John Herschel Project
From:
Thomas Maclear
To:
Sir John Herschel
Date:
[23 April 1837]
Source of text:
RS:HS 12.102
Summary:

Intended to ride over today, but urgent mail from England claimed his attention. No news from the Admiralty. No news of the tide machine. The tripods are finished. Gathers that the Bonita cannot perform all D. F. J. Arago wished.

Contributor:
John Herschel Project
From:
Thomas Maclear
To:
Sir John Herschel
Date:
[5 May 1837]
Source of text:
RS:HS 12.103
Summary:

Received the enclosed communications by the steamer. Can JH send him a list of unobserved comet stars? Work on N. L. Lacaille's Observatory gives satisfaction. Regarding Capt. Mackonochee. Lacaille's angular measurements are not above suspicion. Observed the two rings of Saturn distinctly.

Contributor:
John Herschel Project
From:
Thomas Maclear
To:
Sir John Herschel
Date:
[19 May 1837]
Source of text:
RS:HS 12.104
Summary:

Will call on JH tomorrow as he intends visiting Simon's Bay. Is taking a proof sheet to Cape Town. There appears to be a great discrepancy between the Captain's statement and N. L. Lacaille's station. The latter's station at Rubeck Castel remains perfect.

Contributor:
John Herschel Project
From:
Thomas Maclear
To:
Sir John Herschel
Date:
[29 May 1837]
Source of text:
RS:HS 12.105
Summary:

The examination of the standard deal rod was commenced yesterday. Comments on the procedure and gives readings. The base line was levelled on Wednesday, Thursday, and Friday and he is now ready to measure it. Would like JH to be present if possible when he measures it. Had 25 visitors in one morning recently.

Contributor:
John Herschel Project
From:
Thomas Maclear
To:
Sir John Herschel
Date:
[13 June 1837]
Source of text:
RS:HS 12.106
Summary:

Weather was so unpromising that he sent off the men who were to repair the ravages to the base line levelings. Will JH therefore come on Wednesday instead of Monday provided the weather remains fine. Sorry he missed JH's request for barometric comparisons.

Contributor:
John Herschel Project
From:
Thomas Maclear
To:
Sir John Herschel
Date:
[20 June 1837]
Source of text:
RS:HS 12.107
Summary:

Had an unfortunate accident with the rods yesterday; one was smashed by the force of the wind. Intends to stake the whole line before the actual measurement takes place. Will calculate JH's Brisbane stars.

Contributor:
John Herschel Project
From:
Thomas Maclear
To:
Sir John Herschel
Date:
[23 June 1837]
Source of text:
RS:HS 12.108
Summary:

Sends the observations of the 21st copied by his daughter Mary. The leak in the center room has been repaired. Comments on JH's plan for measuring the base line. The Brisbane stars are nearly finished.

Contributor:
John Herschel Project
From:
Thomas Maclear
To:
Sir John Herschel
Date:
[2 November 1837]
Source of text:
RS:HS 12.109
Summary:

Gives a list of the close Polar stars. Started last night to observe the stars on JH's list but was put off by JH's right ascensions. Will observe each star again this night. John Fairbairn cannot divest himself of the apprehension of danger to Andries Stockenström.

Contributor:
John Herschel Project
From:
Thomas Maclear
To:
Sir John Herschel
Date:
[23 November 1837]
Source of text:
RS:HS 12.109bis
Summary:

Encloses a plan of the triangulation and comments on his method. Thinks of making the baseline on the parade a permanent standard and has written to the Governor to obtain permission, as there is friction between the Board of Ordnance and the Cape Authorities over the ownership of the Parade. Has had no reply from the Governor as yet.

Contributor:
John Herschel Project
From:
Thomas Maclear
To:
Sir John Herschel
Date:
[12 December 1837]
Source of text:
RS:HS 12.110
Summary:

The zenith sector was brought by the Wellesley and is now at the Observatory. Outlines some observations he hopes to make with it. Is about to write to R. Thom[p]son. Has some important matters to discuss with JH when he calls.

Contributor:
John Herschel Project
From:
Thomas Maclear
To:
Sir John Herschel
Date:
[13 January 1838]
Source of text:
RS:HS 12.111
Summary:

The zenith sector seems to perform very well, and he is now ready to move it to the stations. Has been troubled with cloudy weather. C. P. Smyth is working the mural circle on the stars. Thomas Jones has not prepared the diagonal scale promised by Francis Baily. Has not been well lately. No news from England except that Admiral George Elliott has permission from the Admiralty to settle the land question. Encloses a catalogue of Zenith stars.

Contributor:
John Herschel Project
From:
Thomas Maclear
To:
Sir John Herschel
Date:
1 February [1838]
Source of text:
RS:HS 12.112
Summary:

Will not be time to take the zenith sector to Klypfonteyn before JH's departure. Must finish work with the pendulum as it has to be returned to Francis Baily via JH. Will ride over on Sunday morning.

Contributor:
John Herschel Project
From:
Thomas Maclear
To:
Sir John Herschel
Date:
[21 September 1838]
Source of text:
RS:HS 12.113
Summary:

Sends report on [N. L.] Lacaille's Observatory Stations. Tells of expeditions to Klipfontein. Lack of observing due to absence at Cape. Mural circle must be corrected or replaced. Needs an equatorial telescope. Agrees theodolite telescope would be useful.

Contributor:
John Herschel Project
From:
Thomas Maclear
To:
Sir John Herschel
Date:
[29 October 1838]
Source of text:
RS:HS 12.114
Summary:

Mr. Borcherd's son, who is contemplating work in the educational field in South Africa, would like to call on JH to obtain his advice. Question of the land about the Observatory has been settled. Has had a copy of G. B. Amici's paper on a prismatic reflecting circle; comments on this.

Contributor:
John Herschel Project