Search: Herschel, John in correspondent 
Selwyn, William in correspondent 
1870-1879::1870::04 in date 
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From:
Sir John Herschel
To:
William Selwyn
Date:
[23 April 1870]
Source of text:
RS:HS 24.304
Summary:

Asks whether WS has photographs of the sun for 21 and 22 April. Notes how curious sunspot activity has been. Doubts that such is reconcilable with the notion of 'meteoric in-falls.'

Contributor:
John Herschel Project
From:
William Selwyn
To:
Sir John Herschel
Date:
[25 April 1870]
Source of text:
RS:HS 15.507
Summary:

Is sending solar autographs. Notes that in groups of spots the larger precede the smaller spots. Can JH form any theories from this?

Contributor:
John Herschel Project
From:
William Selwyn
To:
Sir John Herschel
Date:
25?] April? [1870
Source of text:
RS:HS 15.517
Summary:

Detached postscript that discusses the margins of the two photographs, which seem to show that all planets are in the near hemisphere.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
William Selwyn
Date:
[30 April 1870]
Source of text:
RS:HS 24.309
Summary:

Is returning March heliographs. Discusses the appearance of the spots. Has not received the April heliographs.

Contributor:
John Herschel Project