Search: Herschel, John in correspondent 
Talbot, William Henry Fox in correspondent 
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Herschel, John in addressee 
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1840-1849 in date 
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From:
William Henry Fox Talbot
To:
Sir John Herschel
Date:
[26 October 1847]
Source of text:
RS:HS 17.319
Summary:

Comments on astronomical symbols, and position of camera when photographing buildings.

Contributor:
John Herschel Project
From:
William Henry Fox Talbot
To:
Sir John Herschel
Date:
[4 February 1848]
Source of text:
RS:HS 17.320
Summary:

Has performed experiments measuring the deviation of spectra through an obliquely placed diffraction grating. Believes they strongly support the wave theory of light.

Contributor:
John Herschel Project