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Tyndall, John in correspondent 
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Herschel3634

From:
John Tyndall
To:
Sir John Herschel
Date:
[17 November 1864]
Source of text:
RS:HS 17.397 (C: RI 533)
Summary:

JT does not have 'luxury' of using sunshine; uses electric light. Perhaps this adds to inability to obtain heat spots [see JH's 1864-11-16].

Contributor:
John Herschel Project

Tyndall2184

From:
John Tyndall
To:
John Herschel
Date:
18th Nov. 1864
Source of text:
HS 398a, RS
Summary:

No summary available.

Contributor:
Tyndall Project

Herschel3327

From:
John Tyndall
To:
Sir John Herschel
Date:
[18 November 1864]
Source of text:
RS:HS 17.398a (C: RI 534)
Summary:

Asks JH to be a shareholder in venture to publish new weekly scientific journal.

Contributor:
John Herschel Project

Tyndall2186

From:
John Herschel
To:
John Tyndall
Date:
Nov. 21. 1864
Source of text:
HS/398b, RS
Summary:

No summary available.

Contributor:
Tyndall Project

Herschel3345

From:
Sir John Herschel
To:
John Tyndall
Date:
[21 November 1864]
Source of text:
RS:HS 17.398b (C: 24.69; C: RI 535)
Summary:

Wishes luck but expresses inability to help with new science journal [see JT's 1864-11-18].

Contributor:
John Herschel Project

Herschel3406

From:
John Tyndall
To:
Sir John Herschel
Date:
[7 February 1865]
Source of text:
RS:HS 17.399a (C: RI 536)
Summary:

Sends copy of JT's '3rd Memoir,' along with specimens of liquid mercury ethyl and mercury methyl from discoverers Edward Frankland and B. F. Duppa.

Contributor:
John Herschel Project

Herschel3510

From:
John Tyndall
To:
Sir John Herschel
Date:
[1866?]-2
Source of text:
RS:HS 17.399c
Summary:

Corrects misinformation about refraction and dispersion of mercury ethyl and mercury methyl.

Contributor:
John Herschel Project

Herschel3361

From:
Sir John Herschel
To:
John Tyndall
Date:
[3 March 1866]
Source of text:
RS:HS 17.399b (C: 24.144)
Summary:

Describes experiment involving viewing spectrum of a light flash as it advances and recedes. [Marked 'not sent on further consideration.']

Contributor:
John Herschel Project

Herschel3191

From:
John Tyndall
To:
Sir John Herschel
Date:
[26 May 1866]
Source of text:
RS:HS 17.400 (C: RI 539)
Summary:

Comments on excellence of the lecture at the Royal Institution of JH's son [Alexander].

Contributor:
John Herschel Project

Herschel3524

From:
Sir John Herschel
To:
John Tyndall
Date:
[28 May 1866]
Source of text:
RS:HS 24.157 (C: RI 540)
Summary:

Thanks for note [see JT's 1866-5-26] on improvement of the lecturing style of JH's son [Alexander]. JH's son has studied lecture's subject deeply and loves science; JH hopes will be physics professor at a 'considerable institution.'

Contributor:
John Herschel Project

Herschel3178

From:
John Tyndall
To:
Sir John Herschel
Date:
[30 October 1867]
Source of text:
RS:HS 17.401 (C: RI 541)
Summary:

Asks whether Michael Faraday's work with glass resulted in improved manufacturing or if rather its main scientific value was in discovery of diamagnetism.

Contributor:
John Herschel Project

Herschel3412

From:
Sir John Herschel
To:
John Tyndall
Date:
[3 November 1867]
Source of text:
RS:HS 24.210
Summary:

Believes Michael Faraday's boro-silicate of lead has not been used for telescopes, but JH and others have tried using it for other optical purposes. Describes method for producing veinless flint glass.

Contributor:
John Herschel Project

Herschel3525

From:
John Tyndall
To:
Sir John Herschel
Date:
[11 July 1868]
Source of text:
RS:HS 17.402
Summary:

JT has suggested that JH's son [Alexander] be appointed to position in Royal School of Mines, but colleagues, unwisely, JT thinks, want someone more well-known.

Contributor:
John Herschel Project

Herschel3526

From:
Sir John Herschel
To:
John Tyndall
Date:
[26 November 1868]
Source of text:
RS:HS 24.241 (C: RI 547-8)
Summary:

Thanks for paper on action of solar and electric light on vapors, which should give JT further insight into blue color of sky and polarization of skylight. Comments on the latter. JH's son [Alexander] is working hard at Glasgow.

Contributor:
John Herschel Project

Herschel3152

From:
John Tyndall
To:
Sir John Herschel
Date:
[27 November 1868]
Source of text:
RS:HS 17.403
Summary:

Is studying vesicles. JH's son [Alexander] may yet get Royal School of Mines appointment.

Contributor:
John Herschel Project

Herschel3635

From:
John Tyndall
To:
Sir John Herschel
Date:
[30 November 1868]
Source of text:
RS:HS 17.404 (C: RI 550)
Summary:

Observations on subjecting carbonic acid to concentrated beam of an electric lamp. Records experimental result so far. Interested in ordinary dust particles under electric light.

Contributor:
John Herschel Project

Herschel3536

From:
John Tyndall
To:
Sir John Herschel
Date:
[1 December 1868]
Source of text:
RS:HS 17.405a (C: RI 551-2)
Summary:

Continues experiments with carbonic acid and electric light [see JT's 1868-11-30], hoping to 'explode' idea that atmosphere's polarization is due to reflection by air particles.

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

Herschel3427

From:
John Tyndall
To:
Sir John Herschel
Date:
3 December [1868]
Source of text:
RS:HS 17.412 (C: RI 555)
Summary:

Continues experiments with carbonic acid and electric light [see JT's 1868-11-30], suggesting possible cause of blue cloud color and eventual whitening of light.

Contributor:
John Herschel Project

Herschel3428

From:
John Tyndall
To:
Sir John Herschel
Date:
12 December [1868]
Source of text:
RS:HS 17.413 (C: RI 556)
Summary:

Asks JH to review paper on blue color of sky, polarization of skylight, and polarization of light by cloudy matter.

Contributor:
John Herschel Project
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