From:
Warren de La Rue
To:
Sir John Herschel
Date:
[3 July 1864]
Source of text:
RS:HS 6.155
Summary:
Appreciates the difference between Robert Hooke's and JH's suggestions for a helioscopic telescope. Comments on these suggestions. Has recently constructed a reflecting prism. Comments on this.
Contributor:
John Herschel Project