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1840-1849::1847::03::01 in date 
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Herschel14105

From:
[John] Lee
To:
Sir John Herschel
Date:
[1 March 1847]
Source of text:
TxU:H/M-0329; Reel 1087
Summary:

Plans to send parcel to observatory at Cape of Good Hope; does JH have anything to include?

Contributor:
John Herschel Project

Herschel3541

From:
Sir John Herschel
To:
James David Forbes
Date:
[1 March 1847]
Source of text:
St. Andrews 10a (C: RS:HS 22.304)
Summary:

Believes all actinometric measurements made are useless because they did not take into account the rate of expansion of the liquid, which is not constant.

Contributor:
John Herschel Project
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