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1860-1869::1869::10::23 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

Herschel581

From:
Sir John Herschel
To:
George Biddell Airy
Date:
[23 October 1869]
Source of text:
RGO 6.361.631
Summary:

Continues to rail against the imposition of the metric system in India; argues against any change in the British sovereign coin.

Contributor:
John Herschel Project
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