From:
C. A. von Steinheil
To:
Sir John Herschel
Date:
[13 May 1842]
Source of text:
RS:HS 17.4
Summary:
Suggests new method of gold plating the telescopic mirrors to prevent oxidation. Mentions having tried to galvanize the mirrors with 'Galvana plastik.'
Contributor:
John Herschel Project