From:
Warren de La Rue
To:
Sir John Herschel
Date:
[28 September 1857]
Source of text:
RS:HS 6.140
Summary:
Has not been able to go to Kew Observatory yet. The photoheliograph has to await John Welsh's return from Scotland. A reflector with a diagonal mirror would be suitable for celestial objects. Has now removed to Cranford.
Contributor:
John Herschel Project