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From:
Macedonio Melloni
To:
Sir John Herschel
Date:
[2 March 1841]
Source of text:
RS:HS 12.318
Summary:

Is grateful for JH's obliging offer. Regrets his own unfortunate article regarding JH's experiments; comments on this. Is pleased JH is to continue with his on light.

Contributor:
John Herschel Project
From:
Edward Sabine
To:
Sir John Herschel
Date:
3 March [1841?]
Source of text:
RS:HS 15.325
Summary:

Sends JH some actinometer observations and a letter from G. B. Airy to forward to Humphrey Lloyd. Also some observations of shooting stars made by [James] Farquharson.

Contributor:
John Herschel Project
From:
Edward Sabine
To:
Sir John Herschel
Date:
[4 March 1841]
Source of text:
RS:HS 15.125
Summary:

Congratulates JH on his latest child. Notes that data from James Ross show great disturbances at the Kerguelen station simultaneously with Toronto and Greenwich. Has sent various data to C. F. Gauss. Wilhelm Weber reports a new magnetic station at Havana recording by the British system. Notes Ross's dip data supports Gauss's theoretical expectations.

Contributor:
John Herschel Project
From:
F. M. Eardley-Wilmot
To:
Sir John Herschel
Date:
[7 March 1841]
Source of text:
TxU:H/M-0174; Reel 1087
Summary:

Magnetic observatory is still not operational one year after FW's arrival. Thomas Maclear is now in 'Zwartsland' [Zwartkops?]. FW shares quarters with C. P. Smyth and William Mann. Hopes to begin observations next week at Cape Town and Simon's Bay; G. G. Lewis will make observations at Grahamstown. Problems with meteorological instruments. Proposes magnetic survey of entire colony. [JH annotation: Enquire what FW meant about measurement conversions, malfunctioning needle, and broken tube in 19 Feb. 1841 letter to Humphrey Lloyd.]

Contributor:
John Herschel Project
From:
Edward Sabine
To:
Sir John Herschel
Date:
8 March [1841]
Source of text:
RS:HS 15.301
Summary:

Thinks enclosed letter should be appended to [James] Farquharson's report on aurora. Wants to bring magnetometer to Alford. Hopes JH has [Humphrey] Lloyd's article regarding instruments.

Contributor:
John Herschel Project
From:
Thomas Maclear
To:
Sir John Herschel
Date:
[8 March 1841]
Source of text:
RS:HS 12.129
Summary:

Came back from Zwartland for a day, but returns tomorrow. Relates news of the measuring of the base line. Visited magnetic observatory; work in Zwartland not yet complete. Magnetic Observatory satisfactory despite slow construction. No news of the obelisk yet.

Contributor:
John Herschel Project
From:
Eliza Mary Hamilton
To:
Sir John Herschel
Date:
[9 March 1841]
Source of text:
RS:HS 10.148
Summary:

Her brother has sent JH's letter and she will be only too pleased to send her poems for whatever purpose he requires them.

Contributor:
John Herschel Project
From:
Edward Sabine
To:
Sir John Herschel
Date:
[11 March 1841]
Source of text:
RS:HS 15.143
Summary:

Discusses plans for publishing magnetic storm data. Mentions transportable magnetic instruments and their use for a travelling observatory on an expedition to the Falkland Islands.

Contributor:
John Herschel Project
From:
Robert Warington
To:
Sir John Herschel
Date:
[13 March 1841]
Source of text:
RS:HS 18.376
Summary:

Invites JH to join new Chemical Society. Committee proposed JH as first president.

Contributor:
John Herschel Project
From:
William Henry Fox Talbot
To:
Sir John Herschel
Date:
[17 March 1841]
Source of text:
RS:HS 17.304a
Summary:

Announces his invention of the 'calotype', and his application for a patent. Questions JH on his address to R.A.S., objecting to idea that universe is infinite.

Contributor:
John Herschel Project
From:
William Richard Hamilton
To:
Sir John Herschel
Date:
[17 March 1841]
Source of text:
RS:HS 9.220
Summary:

Has just received the enclosed communication from Sir Hilgrove Turner, lately Governor of Bermuda. Believes JH is the only person who can deal with it.

Contributor:
John Herschel Project
From:
Edward Sabine
To:
Sir John Herschel
Date:
[18 March 1841]
Source of text:
RS:HS 15.126
Summary:

Norwegian government plans to support a magnetic observatory. Discusses details concerning R.S.L. logistical support and sources for instruments and training. Encloses Wilhelm Weber's letter concerning the instruments. Notes Charles Riddell's return and Lieutenant Younghusband's continued good work.

Contributor:
John Herschel Project
From:
William Henry Fox Talbot
To:
Sir John Herschel
Date:
[18 March 1841]
Source of text:
RS:HS 17.305a
Summary:

Preparing his calotype paper for publication. Looking for a summer house, somewhere interesting to photograph.

Contributor:
John Herschel Project
From:
William Rowan Hamilton
To:
Sir John Herschel
Date:
[19 March 1841]
Source of text:
unknown
Summary:

Considering motion as a 'successive excitement of powers.'

Contributor:
John Herschel Project
From:
George Biddell Airy
To:
Sir John Herschel
Date:
[20 March 1841]
Source of text:
RS:HS 1.93 (C: RGO 6.340.313)
Summary:

Sending draft of report and appendix. Specimen of a gauging scale.

Contributor:
John Herschel Project
From:
Edward Sabine
To:
Sir John Herschel
Date:
22 March [1841]
Source of text:
RS:HS 15.302
Summary:

Discusses proposed temperature experiments involving balloons. Prince Edward Island would be good observatory but funds are lacking. [C. F.] Gauss's article translated for Scientific Memoirs.

Contributor:
John Herschel Project
From:
George Biddell Airy
To:
Sir John Herschel
Date:
[25 March 1841]
Source of text:
TxU:H/M-0627.6
Summary:

A note to accompany additions, comments, and emendations relating to the report of the Standards Commission.

Contributor:
John Herschel Project
From:
James David Forbes
To:
Sir John Herschel
Date:
[26 March 1841]
Source of text:
RS:HS 7.297
Summary:

Sending a notice about the polarization of the sky. Also some practical papers he set at Durham. Has the obelisk ready for shipment to the Cape. Has asked Richard Taylor to send him a copy of his report on Meteorology.

Contributor:
John Herschel Project
From:
Caroline Lucretia Herschel
To:
Sir John Herschel
Date:
[31 March 1841]
Source of text:
unknown
Summary:

Lists those who visited CH on her birthday.

Contributor:
John Herschel Project
From:
Macedonio Melloni
To:
Sir John Herschel
Date:
[31 March 1841]
Source of text:
RS:HS 12.319
Summary:

Is about to leave Paris and hopes to receive the meteorological information at Naples. Awaits with impatience JH's work on the rays of light announced in his last letter.

Contributor:
John Herschel Project