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
Showing 1–1 of 1 item
Provides details about where to buy actinometers, and what type to buy.