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1840-1849 in date 
Sykes, William Henry in addressee 
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RS-MM-000644

From:
Edward Sabine
To:
William Henry Sykes
Date:
20 November 1840
Source of text:
MM/11/150, Royal Society
Summary:

No summary available.

Contributor:
Royal Society

RS-MM-000647

From:
Luke Howard
To:
William Henry Sykes
Date:
30 April 1841
Source of text:
MM/11/154, Royal Society
Summary:

No summary available.

Contributor:
Royal Society

Herschel3197

From:
Sir John Herschel
To:
William Henry Sykes
Date:
[11 March 1847]
Source of text:
RS:HS 17.143 (C: RS:HS 22.308)
Summary:

Notes that actinometer observations prove faulty due to problem with instruments. Asks that WS notify Indian observatories to join others in terminating such observations until JH finds method of getting around problem.

Contributor:
John Herschel Project

Herschel3168

From:
Sir John Herschel
To:
William Henry Sykes
Date:
1848[-1-17 or later]
Source of text:
RS:HS 17.144b
Summary:

JH writes to the best of his knowledge about William Mann's competence in various areas.

Contributor:
John Herschel Project
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