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From:
[Edward Joshua Cooper]
To:
Sir John Herschel
Date:
[18 January 1840]
Source of text:
RAS:JH Archive 5/4.8 verso; Reel 8
Summary:

Recalls earlier letter in which [EC] made suggestions to JH for improving Daguerreotype.

Contributor:
John Herschel Project
From:
Michael Faraday
To:
Sir John Herschel
Date:
[18 January 1840]
Source of text:
RS:HS 7.182
Summary:

As JH has tried many varnishes he wonders if he has ever tried shellac. Has tried it on specimens of brass. Many thanks for his invitation.

Contributor:
John Herschel Project
From:
William Rowan Hamilton
To:
Sir John Herschel
Date:
[18 January 1840]
Source of text:
unknown
Summary:

Confides that the past year has been 'a sombre one ... but not unhappy.'

Contributor:
John Herschel Project