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Sabine, Edward in correspondent 
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Herschel2826

From:
Edward Sabine
To:
Sir John Herschel
Date:
[8 October 1840]
Source of text:
RS:HS 15.106
Summary:

Actinometers for [Louis] Agassiz and John Caldecott are ready. Asks if JH wants to compare them to his standard instrument. Excessive magnetic disturbances in May were found simultaneously in Göttingen and Toronto, but the curves do not correspond.

Contributor:
John Herschel Project

Herschel2827

From:
Edward Sabine
To:
Sir John Herschel
Date:
[12 October 1840]
Source of text:
RS:HS 15.107
Summary:

Has requested John Caldecott to do what is needful to his own and [Louis] Agassiz's actinometers. Mentions great magnetic disturbances in June are not correlated in Toronto, Greenwich, and other observatories. Mentions proposal for correlation of observations between U.S. and Britain. ES leaves soon for Guernsey.

Contributor:
John Herschel Project
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