Search: 1840-1849::1843::07::21 in date 
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From:
William Rutter Dawes
To:
Sir John Herschel
Date:
[21 July 1843]
Source of text:
TxU:H/M-0157; Reel 1087
Summary:

WD's 1843 measurements for Gamma Virginis. Used crystal micrometer for all observations, to compare with parallel wire micrometer used in past.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
William Radcliffe Birt
Date:
[21 July 1843]
Source of text:
RS:HS 19.104
Summary:

Yesterday's letter was mistakenly sent to WB's former address. Sends copy.

Contributor:
John Herschel Project
From:
Hector Tyndale
To:
John Tyndall
Date:
21st July 1854
Source of text:
MS JT/1/T/45; MS JT/1/TYP/5/1589, RI
Summary:

No summary available.

Contributor:
Tyndall Project