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Babinet, Jacques in addressee 
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From:
Sir John Herschel
To:
Jacques Babinet
Date:
[4 February 1862]
Source of text:
RS:HS 19.147
Summary:

Notes ingenuity of JB's gravimetric balance. Astonished that it did not occur to anyone before. [Letter continues 5 Feb.:] Suggestion for improving torsion thread arrangement.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
Jacques Babinet
Date:
[24 February 1862]
Source of text:
RS:HS 19.148
Summary:

JB's solution to torsion thread arrangement is simpler and more ingenious than JH's. Enquires about details of gravimetric balance. Pendulum measurements. Density of continents. Clarification of JH's privileges as foreign associate of Institute. Death of J. B. Biot.

Contributor:
John Herschel Project