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1870-1879::1870::12::03 in date 
Herschel, John in addressee 
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From:
George Biddell Airy
To:
Sir John Herschel
Date:
[3 December 1870]
Source of text:
RGO 6.382.357
Summary:

Is sending on G. G. Stokes instructions about polarization; several expeditions have left for more southerly locations to observe the upcoming solar eclipse.

Contributor:
John Herschel Project
From:
John Tyndall
To:
Sir John Herschel
Date:
3 December [1870?]
Source of text:
RS:HS 17.410 (C: RI 575)
Summary:

Thanks for suggestion-filled letter. Remarks on blue color of water.

Contributor:
John Herschel Project