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Vallack, B. W. S. in addressee 
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Herschel4317

From:
Sir John Herschel
To:
B. W. S. Vallack
Date:
[16 February 1866]
Source of text:
RS:HS 17.417b (C: RS:HS 24.141)
Summary:

Suggests weaknesses in BV's plans for a binocular telescope.

Contributor:
John Herschel Project
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Transcription available