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Herschel, John in correspondent 
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From:
Charles Babbage
To:
Sir John Herschel
Date:
[20 July 1816]
Source of text:
RS:HS 2.65
Summary:

Regarding JH's plans for the third part of S. F. Lacroix. Royal Institution and CB's articles for their journal. Hopes that JH will not write his book on Newton yet. Is hoping to publish a work on the Calculus of Functions. Hopes to meet him when in Devon.

Contributor:
John Herschel Project
From:
Charles Babbage
To:
Sir John Herschel
Date:
1816-[8]
Source of text:
RS:HS 2.66
Summary:

Is glad to hear that he will be coming to Torquay. Regarding his new method of solving functions.

Contributor:
John Herschel Project
From:
Charles Babbage
To:
Sir John Herschel
Date:
[27 September 1816]
Source of text:
RS:HS 2.67
Summary:

Temporarily at Bridgenorth as his wife's father has died. Must delay his visit to London. Has been interesting his brother-in-law in gas lights.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
Charles Babbage
Date:
[10 October 1816]
Source of text:
RS:HS 2.68 (C: RS:HS 20.36)
Summary:

Leaving Cambridge shortly, probably for good. Will be under his father's directions observing the stars. Has sent the appendix to S. F. Lacroix. Regarding JH's error in the printing of an equation. Gives an equation for CB to comment on.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
Charles Babbage
Date:
[24 December 1816]
Source of text:
RS:HS 2.69 (C: RS:HS 20.37)
Summary:

Has received a copy of their book. Sending a copy of his own paper printed in the R.S.P.T. Has prepared the way for CB's book on examples. Has been examining [John?] Spence's manuscript.

Contributor:
John Herschel Project
From:
Edward Daniel Clarke
To:
Sir John Herschel
Date:
[1 December 1816]
Source of text:
RS:HS 5.256 (C: TxU:H/M-0142; Reel 1087)
Summary:

Chemical experiments with EC's blowpipe. Discovered cause of blowpipe explosions. Thank Mrs. Lowry for carbon substance sent to EC. Sent metal of Baryta to W. H. Wollaston. Suspects metallic nature of carbon and diamond.

Contributor:
John Herschel Project
From:
Henry Warburton
To:
Sir John Herschel
Date:
[24 April 1816]
Source of text:
RS:HS 18.36
Summary:

Suggests changes for JH's paper on Swedish felspar submitted to Geological Society. Confusion between this and other silicates. Compares JH's analysis to that of Wilhelm Hisinger and others.

Contributor:
John Herschel Project
From:
Henry Warburton
To:
Sir John Herschel
Date:
[3 June 1816]
Source of text:
RS:HS 18.37
Summary:

Discussed JH's proposed felspar paper [see HW's 1816-4-24] with W. H. Wollaston. Suggests using Wollaston's and [recently deceased Smithson] Tennant's unpublished method to test for alkalis and give Tennant credit for it. James Smithson first coined term 'silicate'.

Contributor:
John Herschel Project
From:
Sir William Watson
To:
Sir John Herschel
Date:
[26 September 1816]
Source of text:
RS:HS 18.109
Summary:

Enjoyed visit of William Herschel and JH. Sorry about accident with coach. Discusses Horne Tooke's search for metaphysics through etymology. Extensive analysis of nature of verbs. Notes [daughter] Joy's response to JH's Masonic sign.

Contributor:
John Herschel Project
From:
Sir William Watson
To:
Sir John Herschel
Date:
[16 November 1816]
Source of text:
RS:HS 18.110
Summary:

Thanks JH for William Herschel's gift. Wishes Horne Tooke had lived to publish third volume. E. D. Clarke's experiment with oxygen-hydrogen fuel mix to blowpipe was anticipated by Americans. Cites 1803 journal from New York.

Contributor:
John Herschel Project
From:
Sir William Watson
To:
Sir John Herschel
Date:
[23 December 1816]
Source of text:
RS:HS 18.111
Summary:

Thanks JH for cheeses and etymology letter. 'Substantive quality' of names. Agrees with [Thomas] Hobbes, questions sensible perceptions. Invites WH for visit as respite from bad health.

Contributor:
John Herschel Project
From:
John William Whittaker
To:
Sir John Herschel
Date:
20 July [1816]
Source of text:
RS:HS 18.243
Summary:

Returning home; father dying. News of Cambridge friends. Unable to send information JH requested about university at Ryde. William Whewell upset, because Whewell's father died and was buried before Whewell was notified.

Contributor:
John Herschel Project
From:
John William Whittaker
To:
Sir John Herschel
Date:
[29 August 1816]
Source of text:
RS:HS 18.244
Summary:

Manuscripts for [1816 translation of S. F. Lacroix's Traité du calcul différential et du calcul intégral] are ready. Send notes and missing appendix quickly, or press will stop.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
Edward Daniel Clarke
Date:
[1816]
Source of text:
Sydney Ross Collection
Summary:

Mentions some chemical experiments on which JH has worked; hopes EC will exhibit his experiments for R.S.L.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
Edward Daniel Clarke
Date:
[1816]
Source of text:
Sydney Ross Collection
Summary:

Describes chemical experiments carried out by JH on corundum. Attempts to interpret these experiments.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
Edward Daniel Clarke
Date:
[1816]
Source of text:
Sydney Ross Collection
Summary:

Praises EC for 'amazing experiments' published in [William T.] Brande's journal [Quarterly Journal of Science and Art]. Wishes EC's publication had appeared in R.S.P.T. Has an experiment to show EC.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
Edward Daniel Clarke
Date:
[20 April 1816]
Source of text:
Sydney Ross Collection
Summary:

Thanks EC for his interest in a paper JH submitted to the Geological Society. JH has come to question some of his observations and to recognize that J. J. Berzelius anticipated JH's recognition of the acid nature of silica.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
Edward Daniel Clarke
Date:
[1816]
Source of text:
Sydney Ross Collection
Summary:

Reports on some chemical results obtained by JH.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
Edward Daniel Clarke
Date:
1816-11
Source of text:
Sydney Ross Collection
Summary:

Sending EC a specimen that W. H. Wollaston describes as 'the most intractable substance by fire' he has ever seen. Discusses its properties and possible chemical composition.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
Edward Daniel Clarke
Date:
1816-12[?]-24
Source of text:
Sydney Ross Collection
Summary:

Returns with thanks EC's specimen of Island Crystal. Also discusses specimen of titanium lent by EC.

Contributor:
John Herschel Project