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Brachet, Achille in correspondent 
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From:
Achille Brachet
To:
Sir John Herschel
Date:
1855-11
Source of text:
RS:HS 4.211
Summary:

On telescopes and their fittings.

Contributor:
John Herschel Project
From:
Achille Brachet
To:
Sir John Herschel
Date:
[8 November 1855]
Source of text:
RS:HS 4.210
Summary:

Concerning telescopes and their fittings, and queries relative to them. Intends to publish a work on them.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
Achille Brachet
Date:
[15 November 1855]
Source of text:
RS:HS 4.212 & 23.161
Summary:

Answer to his queries on telescopes and rays of light. Is sorry he rejects Joseph Fraunhofer's fixed lenses.

Contributor:
John Herschel Project
From:
Achille Brachet
To:
Sir John Herschel
Date:
[21 November 1856]
Source of text:
RS:HS 4.213
Summary:

Sends a few explanations of G. B. Amici's third and sixth series microscopes.

Contributor:
John Herschel Project
From:
Achille Brachet
To:
Sir John Herschel
Date:
[30] November 1856
Source of text:
RS:HS 4.214
Summary:

Was pleased to receive his letter. Further concerning G. B. Amici's microscopes.

Contributor:
John Herschel Project