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Renshaw, S. Alexander in correspondent 
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From:
S. Alexander Renshaw
To:
Sir John Herschel
Date:
[10 March 1869]
Source of text:
RS:HS 14.477
Summary:

Desires advice on construction of glass prisms for Newtonian reflecting telescopes. Also asks how to test the parabolic figure of a glass speculum before silvering.

Contributor:
John Herschel Project
Collection
Document type
Transcription available