Search: 1860-1869::1868::12 in date 
Herschel, John in author 
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Herschel1454

From:
Sir John Herschel
To:
George Gabriel Stokes
Date:
[2 December 1868]
Source of text:
Cambridge University Library 7656/H720
Summary:

Further comments on solar light [see GS's 1868-12-1].

Contributor:
John Herschel Project

Herschel3535

From:
Sir John Herschel
To:
John Tyndall
Date:
[2 December 1868]
Source of text:
RS:HS 17.405b (C: 24.242; C: RI 553-4)
Summary:

Thinks JT's work on polarization will lead to remarkable discovery. Discusses production of rainbow, parallels to Isaac Newton's explanation of black spot on a soap bubble, and problems in JT's undulatory theory explanation of reflection. In JT's experiments, what are nebulous particles produced by light in gas or vapor?

Contributor:
John Herschel Project

Herschel3186

From:
Sir John Herschel
To:
Patrick Shanahan
Date:
9?] December [1868
Source of text:
RS:HS 17.201
Summary:

To JH's knowledge, PS's Royal Mint position bore no absolute guarantee of permanence unless he had been paying a 'superannuation' fund.

Contributor:
John Herschel Project

Herschel1456

From:
Sir John Herschel
To:
George Gabriel Stokes
Date:
[12 December 1868]
Source of text:
Cambridge University Library 7656/H721
Summary:

Returns paper on musical scales; agrees with GS's comments on A. Prazmosky's paper [see GS's 1868-12-10].

Contributor:
John Herschel Project

Herschel8359

From:
Sir John Herschel
To:
John Tyndall
Date:
[13 December 1868]
Source of text:
RS:HS 19.160b
Summary:

JT's paper on polarization of sky light suggests that neutral points are functions of cloud density. This verifies JH's earlier explanation of blue sky color. Incomplete polarization. Cause of blue color in water. Corrects note on W. A. Miller's observations of rainbows.

Contributor:
John Herschel Project

Herschel3537

From:
Sir John Herschel
To:
John Tyndall
Date:
[14 December 1868]
Source of text:
RS:HS 24.243 (C: RI 557-8)
Summary:

Thanks for paper verifying JH's prediction that explanation of blue sky color carries with it that of polarization of skylight. Involves ultimate link between chemical and analytical dynamics. Notes that 'neutral points' in sky polarization have yet to be explained; offers tentative explanation based on clues in JT's work.

Contributor:
John Herschel Project

Herschel8969

From:
Sir John Herschel
To:
the R.A.S.
Date:
[22 December 1868]
Source of text:
R.A.S.M.N., 29 (1869), 84-5
Summary:

There having been reports of changes in the nebula around Eta Argus, JH sends the R.A.S. a letter from JH's son John [see JH's son's 1868-11-23] reporting his observations of that object. JH adds his comments.

Contributor:
John Herschel Project

Herschel1457

From:
Sir John Herschel
To:
George Gabriel Stokes
Date:
[25 December 1868]
Source of text:
Cambridge University Library 7656/H722
Summary:

Comments on a paper on the effects of lateral movement in diminishing the intensity of sound.

Contributor:
John Herschel Project

Herschel6643

From:
Sir John Herschel
To:
Elizabeth Colling
Date:
[26 December 1868]
Source of text:
RS:HS 24.244
Summary:

Comments on observations of meteors, comets, and the transit of Mercury.

Contributor:
John Herschel Project

Herschel8703

From:
Sir John Herschel
To:
Sir Henry Taylor
Date:
[29 December 1868]
Source of text:
Bodleian Library, Oxford
Summary:

Has received HT's pamphlet on crime and its prevention and punishment. Praises it and questions some particulars.

Contributor:
John Herschel Project
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