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Babinet, Jacques in correspondent 
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From:
Jacques Babinet
To:
Sir John Herschel
Date:
[25 August 1832]
Source of text:
RS:HS 3.1
Summary:

Introduces Mr. A. Perrey. Remarks on tourmaline. Astronomical matters.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
Jacques Babinet
Date:
[12 September 1832]
Source of text:
RS:HS 25.3.9
Summary:

Responds to JB's 1832-8-25 with comments about the optical properties of tourmaline. JH also talks about his astronomical work, including the collimator on his telescope and his double star work.

Contributor:
John Herschel Project
From:
Jacques Babinet
To:
Sir John Herschel
Date:
[20 June 1833]
Source of text:
RS:HS 3.2
Summary:

Introducing A. T. D'Abbadie, one of his scientific friends.

Contributor:
John Herschel Project
From:
Jacques Babinet
To:
Sir John Herschel
Date:
1849
Source of text:
RS:HS 3.3
Summary:

Presenting A. T. D'Abbadie, who has made a voyage to Brazil. Remarks on JH's calorimeter.

Contributor:
John Herschel Project
From:
Jacques Babinet
To:
Sir John Herschel
Date:
[3 February 1862]
Source of text:
RS:HS 3.4
Summary:

On a static measure for gravity.

Contributor:
John Herschel Project
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:
Jacques Babinet
To:
Sir John Herschel
Date:
[22 February 1862]
Source of text:
RS:HS 19.202
Summary:

Describes procedures, apparatus, and calculations for determining the static gravity of the earth. Thanks JH for some of his writings, and comments that JH, like Newton, has discovered the mind of the Creator and passed this on to humanity.

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
From:
Jacques Babinet
To:
Sir John Herschel
Date:
[15 February 1863]
Source of text:
RS:HS 3.5
Summary:

Regarding the gravimetric balance.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
Jacques Babinet
Date:
[19 February 1863]
Source of text:
RS:HS 19.151 (C: RS:HS 24.10)
Summary:

Suggestions on improving JB's gravimetric balance, constructed on principle of 'Bifilar suspension.' Refers to 1861 report of similar invention by J. A. Brown and another article on this topic.

Contributor:
John Herschel Project
From:
Jacques Babinet
To:
Sir John Herschel
Date:
1867-2
Source of text:
RS:HS 3.6
Summary:

Regarding the work of Emmanuel Liais (astronomer).

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
Jacques Babinet
Date:
[5 March 1867]
Source of text:
RS:HS 19.158
Summary:

No mention of Emmanuel Liais's L'espace céleste in English journals. Contact London publishers to find translator for it. Alexander Herschel is now professor of natural philosophy at Andersonian Institution in Glasgow. Hopes JB's elegant method of measuring gravity by torsion will not die before being put into practice.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
Jacques Babinet
Date:
[7 March 1867]
Source of text:
RS:HS 24.190
Summary:

Not willing to be involved in translation of French work on astronomy [see JB's 1867-2].

Contributor:
John Herschel Project