Search: Sabine, Edward in addressee 
1850-1859::1857::04 in date 
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Herschel2372

From:
Sir John Herschel
To:
Edward Sabine
Date:
[3 April 1857]
Source of text:
RS:HS 15.241 (C: RS:HS 23.193)
Summary:

Thanks ES for his paper. Sun spot activity should increase in 1857. Discusses his own earlier ideas concerning relationship between sun spots and Aurora Borealis.

Contributor:
John Herschel Project

Herschel2375

From:
Sir John Herschel
To:
Edward Sabine
Date:
[8 April 1857]
Source of text:
RS:HS 23.195
Summary:

Discusses advantages of different magnetic charts. Grateful for [P.] Plantamour's observations. Satisfied with [J. R.] Wolf's period of 11.11 years for solar spots.

Contributor:
John Herschel Project
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