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From:
Sir John Herschel
To:
the London Times
Date:
[3 April 1857]
Source of text:
London Times (April 6, 1857), p. 12, col. 4.
Summary:

Urges that observations be made of sunspots. Notes that sunspots are much more evident now than in 1856. [Written by JH under the pseudonym 'Helioscopus']

Contributor:
John Herschel Project