From:
B. W. S. Vallack
To:
Sir John Herschel
Date:
[25 January 1866]
Source of text:
RS:HS 17.416
Summary:
Thanks JH for corrections to the mirrors of his telescope. Says the telescope finally gives 'a satisfactory view of Saturn.' Discusses the lenses for BV's binocular telescope. Thinks photography could benefit from binocular vision.
Contributor:
John Herschel Project