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
Showing 1–3 of 3 items
On telescopes and their fittings.
Concerning telescopes and their fittings, and queries relative to them. Intends to publish a work on them.
Answer to his queries on telescopes and rays of light. Is sorry he rejects Joseph Fraunhofer's fixed lenses.