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Herschel, John in correspondent 
Tyndall, John in correspondent 
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From:
Sir John Herschel
To:
John Tyndall
Date:
[7 June 1870]
Source of text:
RS:HS 24.317 (C: RI 571)
Summary:

Thanks for work on diamagnetism and magne-crystallic action [Researches on Diamagnetism (1870)], which JH is excited to read. Mentions long-abandoned plans for magnetization experiments. Envies those who can see JT's 'magic' experiments at Royal Institution.

Contributor:
John Herschel Project
From:
John Tyndall
To:
Sir John Herschel
Date:
[9 June 1870]
Source of text:
RS:HS 17.409 (C: RI 572)
Summary:

Gratified by JH's 'sympathy and approbation,' and that JH's writing and spirit remain 'firm' and 'fresh.'

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
John Tyndall
Date:
[23 October 1870]
Source of text:
RI 459 (draft : RS:HS 17.409a; C: RS:HS 24.336; C: RI 573-4)
Summary:

Thanks for paper on action of rays 'of high refrangibility' on gases and vapors. Attempts to understand reflection of wave motion on particles with diameters 'incomparably smaller' than length of wave.

Contributor:
John Herschel Project
From:
John Tyndall
To:
Sir John Herschel
Date:
3 December [1870?]
Source of text:
RS:HS 17.410 (C: RI 575)
Summary:

Thanks for suggestion-filled letter. Remarks on blue color of water.

Contributor:
John Herschel Project