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Herschel, John in correspondent 
Pritchard, Charles in correspondent 
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Herschel4518

From:
Charles Pritchard
To:
Sir John Herschel
Date:
n.d.
Source of text:
RS:HS 14. 111
Summary:

Experiments with lens curvature and prisms. Wants to discover set rules for lens thickness-to-curvature ratio.

Contributor:
John Herschel Project
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