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[Richardson, John] in correspondent 
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From:
Sir John Herschel
To:
[Sir John Richardson]
Date:
[1847-12-30 or later
Source of text:
WT 64710.309
Summary:

Provides details about where to buy actinometers, and what type to buy.

Contributor:
John Herschel Project
Collection
Document type
Transcription available