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Howlett, Frederick in correspondent 
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From:
Sir John Herschel
To:
Frederick Howlett
Date:
[23 November 1859]
Source of text:
Adler Ms. 13
Summary:

Sending FH drawings of sunspots made by W. R. Dawes. Asks FH to inspect them and forward them to R.A.S. secretary R. C. Carrington along with any sunspots drawings made by FH on the same dates.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
Frederick Howlett
Date:
[1861 or later]
Source of text:
RS:HS 25.14.13
Summary:

Returns a paper of Mr. Stobart, which deals with astronomical knowledge of the early Egyptians.

Contributor:
John Herschel Project
From:
Frederick Howlett
To:
Sir John Herschel
Date:
[10 January 1861]
Source of text:
RS:HS 10.14
Summary:

Expressing sympathy on the illness of Margaret Louisa Marshall (JH's daughter). Would like to hear the latest news by the bearer. Would JH append his name to the enclosed form.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
Frederick Howlett
Date:
[23 November 1863]
Source of text:
RS:HS 24.23
Summary:

Response to some papers sent to R.A.S.

Contributor:
John Herschel Project
From:
Frederick Howlett
To:
Sir John Herschel
Date:
[25 January 1864]
Source of text:
RS:HS 10.15
Summary:

Comments on the sun spots he has been observing, and some new phenomenon. Any chance of a visit from JH?

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
Frederick Howlett
Date:
[26 January 1864]
Source of text:
RS:HS 24.26
Summary:

On the observation of sun spots.

Contributor:
John Herschel Project
From:
Frederick Howlett
To:
Sir John Herschel
Date:
19] March [1864
Source of text:
RS:HS 19.227
Summary:

Drawing of 'the singular mottled appearance of portions of the Sun's disk ... March 19th 1864'.

Contributor:
John Herschel Project
From:
Frederick Howlett
To:
Sir John Herschel
Date:
[22 March 1864]
Source of text:
RS:HS 10.16
Summary:

Has returned James Nasmyth's letter and has never seen Warren de La Rue's letter. Comments on Nasmyth's 'willow leaves.' Have been observed at Greenwich Observatory. Thanks for his remarks on the best kind of eye-piece.

Contributor:
John Herschel Project
From:
Frederick Howlett
To:
Sir John Herschel
Date:
[27 April 1864]
Source of text:
RS:HS 10.17
Summary:

Hopes the JH's are all well. Would like an eye-piece made by Mr. Cook[e] or any leading optician on the principles of JH as laid down in his paper in R.S.P.T. Shall he refer the optician to this paper?

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
Frederick Howlett
Date:
[30 April 1864]
Source of text:
RS:HS 24.42
Summary:

More on the construction of a good optical eyepiece for solar observations [see FH's 1864-4-27].

Contributor:
John Herschel Project
From:
Frederick Howlett
To:
Sir John Herschel
Date:
[9 May 1864]
Source of text:
RS:HS 10.19
Summary:

Is grateful for his communication on the proposed solar eyepiece. Will call round on his way to town to ascertain if he can leave the manuscript with [Thomas?] Cooke, the instrument maker, so that he can have some idea of the work involved. James Nasmyth will pay attention to screen projection.

Contributor:
John Herschel Project
From:
Frederick Howlett
To:
Sir John Herschel
Date:
[27 April 1867]
Source of text:
RS:HS 10.21
Summary:

Regrets he was out when JH called. Thanks for the elegant verses. Will be moving shortly to a place nearer London, which promises much. Gives notes on some more sun spots, which he has recently observed.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
Frederick Howlett
Date:
[29 April 1867]
Source of text:
RS:HS 10.18 & 24.194
Summary:

Would like FH to study a phenomenon that JH has noticed on the sun's disk and that has no connections with sun-spots.

Contributor:
John Herschel Project
From:
Frederick Howlett
To:
Sir John Herschel
Date:
[4 May 1867]
Source of text:
RS:HS 10.20
Summary:

Is uncertain if he has detected the lightlines on the solar surface to which JH has called attention, but there does seem to be something unusual there. No sun spots are visible just now.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
Frederick Howlett
Date:
[5 May 1867]
Source of text:
RS:HS 24.198
Summary:

Proposes to travel to visit FH next day to observe the sun with him.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
Frederick Howlett
Date:
[10 October 1868]
Source of text:
RS:HS 24.231
Summary:

Details about sunspot observations.

Contributor:
John Herschel Project
From:
Frederick Howlett
To:
Sir John Herschel
Date:
[13 October 1868]
Source of text:
RS:HS 10.22
Summary:

Much obliged for his kind notes on sunspots; there has been a wonderful variety lately. Will make a study of the Julian dates. Can see the Crystal Palace fireworks splendidly from his house.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
Frederick Howlett
Date:
[24 April 1870]
Source of text:
RS:HS 24.306
Summary:

Writes to compare notes on sunspot observations.

Contributor:
John Herschel Project
From:
Frederick Howlett
To:
Sir John Herschel
Date:
[28 April 1870]
Source of text:
RS:HS 10.23
Summary:

Has no idea whether the sunspots appeared suddenly or gradually. The Kew people may be able to help in this matter. Comments on some more sunspots.

Contributor:
John Herschel Project
From:
Frederick Howlett
To:
Sir John Herschel
Date:
[25 August 1870]
Source of text:
RS:HS 10.24
Summary:

Intends bringing the subject of sunspots before the B.A.A.S. next September and would therefore like JH's views on whether in his opinion these spots are mechanical or magnetic. Also any other comments would be welcome.

Contributor:
John Herschel Project