Search: Herschel, John in correspondent 
1840-1849::1840::04::15 in date 
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From:
A. Beale
To:
Sir John Herschel
Date:
[1840 or later]-4-15
Source of text:
Harvard: Houghton AAH 67m-67
Summary:

Discusses glass manufacturing.

Contributor:
John Herschel Project
From:
Henry Piddington
To:
Sir John Herschel
Date:
[15 April 1840]
Source of text:
RS:HS 13.401
Summary:

Sends JH a pamphlet about meteorological observations in India.

Contributor:
John Herschel Project
From:
Robert Hunt
To:
Sir John Herschel
Date:
[15 April 1840]
Source of text:
RS:HS 10.83
Summary:

Would like JH's account of his own method of fixing a photograph as noted in his memoir. Singular phenomenon of the Daguerreotype. Hopes to produce a photographic paper to equal the silver plate before the month has expired. Will let him know when his process is complete.

Contributor:
John Herschel Project