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John Herschel in collection 
1810-1819::1819 in date 
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From:
Charles Babbage
To:
Sir John Herschel
Date:
[1819?]
Source of text:
RS:HS 2.340
Summary:

Would he like to come for a trip down the river to see W. E. Parry's Expedition ships? Query regarding quartz crystals. Date for Pearsonian dinner.

Contributor:
John Herschel Project
From:
Samuel Young
To:
Sir John Herschel
Date:
[1819 to 1826]
Source of text:
RS:HS 18.319
Summary:

Will show JH largest specimen of apophyllite [Argentine spar] in kingdom.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
Charles Babbage
Date:
[1819?]
Source of text:
RS:HS 2.362 (C: RS:HS 20.67)
Summary:

Cannot accompany CB to Deptford because JH busy with James South. Mentions the 'Pearsonian dinner,' 'plagi[h]edral' crystals, and a letter by Wilhelm Olbers.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
Francis Baily
Date:
1819
Source of text:
RS:HS 3.33 (C: RS:HS 20.62)
Summary:

Acknowledges in JH's father's name FB's notice of the upcoming annular eclipse of 1820. Stresses the importance of observing it.

Contributor:
John Herschel Project
From:
George Peacock
To:
Sir John Herschel
Date:
[3 January 1819]
Source of text:
RS:HS 13.263
Summary:

Asks JH to write a letter of recommendation for a mutual friend, and adds some Cambridge news.

Contributor:
John Herschel Project
From:
James Grahame
To:
Sir John Herschel
Date:
[3 January 1819]
Source of text:
RS:HS 8.292
Summary:

Family news and other matters [letter completed 1819-2-23].

Contributor:
John Herschel Project
From:
Charles Babbage
To:
Sir John Herschel
Date:
[7 January 1819]
Source of text:
RS:HS 2.108
Summary:

Gives equation. Is arranging the visit to Paris.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
David Brewster
Date:
[11 January 1819]
Source of text:
TxU:H/L-0110; Reel 1054
Summary:

Mr. Murray will bring to DB two papers by JH, one on hyposulfurous acid and one on mathematical analysis, plus requested abstract of JH's and William Herschel's 'last papers' in R.S.P.T.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
David Brewster
Date:
[11 January 1819]
Source of text:
RS:HS 20.63
Summary:

Note to accompany the sending of some papers; JH is off to Paris.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
Mary Pitt Herschel
Date:
[11 January] 1819
Source of text:
TxU:H/M-0626.1; Reel 1086 (ALS? & C: TxU:H/L-0514.1; Reel 1053)
Summary:

JH arrived safely yesterday and attended event at home of Sir Joseph Banks. Dr. [Matthew] Baillie asked about Lady Mary Herschel. JH and Charles Babbage, preparing to tour France, leave tomorrow for Dover. Wishes better health for MH and William Herschel.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
Mary Pitt Herschel
Date:
[12 January 1819]
Source of text:
TxU:H/L-0514.2; Reel 1053
Summary:

Will sail tomorrow for Calais. Could not find Mr. Armstrong in Dover.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
Mary Pitt Herschel
Date:
[17 January 1819]
Source of text:
TxU:H/L-0514.3; Reel 1053
Summary:

Arrival in France. Travel companions. JH and Charles Babbage will go to Institute tomorrow to visit J. B. Biot, S. D. Poisson, and other mathematicians.

Contributor:
John Herschel Project
From:
William Artaud
To:
Sir John Herschel
Date:
[26 January 1819]
Source of text:
RS:HS 1.413
Summary:

Regarding his father's portrait. Would recommend waiting until the days become clearer and longer.

Contributor:
John Herschel Project
From:
Charles Blagden
To:
Sir John Herschel
Date:
[3 February 1819]
Source of text:
RS:HS 5.75
Summary:

Called to wish him a good journey and to offer his compliments to Sir William and Lady Herschel.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
Sir William Watson
Date:
[15 February 1819]
Source of text:
RS:HS 18.112 (C: RS:HS 20.64)
Summary:

JH's father and mother will call on WW during visit to Bath, scheduled after wedding of JH's cousin. Spent three weeks meeting science luminaries in Paris. Notes continuity of scientific endeavors there over three generations.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
Charles Babbage
Date:
[17 February 1819]
Source of text:
RS:HS 2.109 (C: RS:HS 20.65)
Summary:

Would he please forward the letters and papers which he left behind.

Contributor:
John Herschel Project
From:
Charles Babbage
To:
Sir John Herschel
Date:
[19 February 1819]
Source of text:
RS:HS 2.111
Summary:

Relates the details of his accident. Gives equations and theorems.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
Charles Babbage
Date:
[19 February 1819]
Source of text:
RS:HS 2.110 (C: RS:HS 20.66)
Summary:

Is anxious to hear how his wounds are progressing. Will not be able to come to town yet owing to various circumstances. New chemical experiments.

Contributor:
John Herschel Project
From:
Charles Babbage
To:
Sir John Herschel
Date:
[6 March 1819]
Source of text:
RS:HS 2.114
Summary:

Has dispatched the tourmaline. His chemical experiments. Circulating functions solving chance problems. [Letter postmarked 1819-3-29.]

Contributor:
John Herschel Project
From:
Charles Babbage
To:
Sir John Herschel
Date:
[21 March 1819]
Source of text:
RS:HS 2.112
Summary:

Has had some more tourmaline sent. Gives some more equations. Chemical experiments.

Contributor:
John Herschel Project