Search: Herschel, John in correspondent 
[Percy (3rd Duke of Northumberland), Hugh] in correspondent 
John Herschel Project in contributor 
1840-1849::1840 in date 
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From:
Sir John Herschel
To:
[Hugh Percy (3rd Duke of Northumberland)]
Date:
[1840 to 1847]
Source of text:
RS:HS 19.164
Summary:

Lady [Pleasance] Smith conveyed Duke of Northumberland's interest in JH's color photographs. Encloses others, and explains use of light-sensitive juices of flowers to produce colors.

Contributor:
John Herschel Project