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1810-1819::1819::05 in date 
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From:
Jean Baptiste Biot
To:
Sir John Herschel
Date:
[2 May 1819]
Source of text:
RS:HS 4.84
Summary:

Has been very busy; otherwise he would have answered his friendly letter earlier. Observations on tourmaline. Double refraction.

Contributor:
John Herschel Project
From:
James Grahame
To:
Sir John Herschel
Date:
[7 May 1819]
Source of text:
RS:HS 8.293
Summary:

Family news and ramblings [letter completed 1819-5-23].

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
Charles Babbage
Date:
[8 May 1819]
Source of text:
RS:HS 2.116 (C: RS:HS 20.69 & C inc: TxU:H/L-0051.5; Reel 1054)
Summary:

Answers CB's question on the equation. Hopes to see him in London shortly. Chemical experiments.

Contributor:
John Herschel Project
From:
Sir William Watson
To:
Sir John Herschel
Date:
[12 May 1819]
Source of text:
RS:HS 18.113
Summary:

Delighted that JH proposes to use William Herschel's 20-foot telescope.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
David Brewster
Date:
[15 May 1819]
Source of text:
RS:HS 20.70
Summary:

Some additions to an article submitted about hyposulfurous acid; comments on work by J. B. Biot on polarization and double refraction of crystals.

Contributor:
John Herschel Project