Search: Herschel, John in author 
1870-1879::1870::06::17 in date 
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Herschel2627

From:
Sir John Herschel
To:
William Selwyn
Date:
[17 June 1870]
Source of text:
RS:HS 24.320
Summary:

Sends diagrams showing three new couplets of sunspots. The sun is entering a new phase of activity. Sends drawings made with a glass pen by his son Alexander.

Contributor:
John Herschel Project

Herschel7233

From:
Sir John Herschel
To:
Augustus De Morgan
Date:
[17 June 1870]
Source of text:
RS:HS 24.319
Summary:

Writes about JH's health; justifies writing by sending some curves prepared by JH's son Alexander.

Contributor:
John Herschel Project
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