Search: Selwyn, William in addressee 
Herschel, John in author 
1860-1869::1869::10 in date 
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Herschel2612

From:
Sir John Herschel
To:
William Selwyn
Date:
[23 October 1869]
Source of text:
RS:HS 24.288
Summary:

Is working on a compilation of the measures of double stars. If [Rudolf] Wolf's period of 11.11 years is correct, why should 1810-11, a minimum, mark the first observations of solar spots?

Contributor:
John Herschel Project

Herschel2614

From:
Sir John Herschel
To:
William Selwyn
Date:
1869-10
Source of text:
RS:HS 24.289
Summary:

Sends [William Whewell's] 'Isle of Sirens' and an acknowledgement to it in 'skimble skamble Hexameters.' Is eager to receive solar photographs and will send others by Professor [George?] Morton.

Contributor:
John Herschel Project
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