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Vallack, B. W. S. in correspondent 
Herschel, John in addressee 
1860-1869::1866 in date 
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Herschel4236

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

Herschel4160

From:
B. W. S. Vallack
To:
Sir John Herschel
Date:
[12 February 1866]
Source of text:
RS:HS 17.417a
Summary:

Responds to JH's criticisms of his binocular telescope plans.

Contributor:
John Herschel Project
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