Search: Herschel, John in addressee 
Lefroy, John Henry in author 
1840-1849::1840::03::27 in date 
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From:
John Henry Lefroy
To:
Sir John Herschel
Date:
[27 March 1840]
Source of text:
TxU:H/M-0330; Reel 1087
Summary:

Progress in construction of observatory. Completion expected in May. Poor weather hampers actinometer observations.

Contributor:
John Herschel Project