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Herschel10733

From:
Robert Hunt
To:
Sir John Herschel
Date:
[16 May 1840]
Source of text:
RS:HS 10.86
Summary:

Returns the photographic drawings of W. H. Fox Talbot with many thanks. Fears for their permanence. Has produced similar pictures himself acting on bromide of silver with hydrocholoric acid. Has had trouble with his periscope lens.

Contributor:
John Herschel Project

Herschel378

From:
Sir John Herschel
To:
George Biddell Airy
Date:
[16 May 1840]
Source of text:
RGO 6.463.70
Summary:

Has a problem with the explanation of interference bands produced by mica being placed between the eye and prism-produced dispersion; the explanation is Baden Powell's.

Contributor:
John Herschel Project

Herschel379

From:
Sir John Herschel
To:
George Biddell Airy
Date:
[1840-5-16 or later]
Source of text:
RGO 6.463.76
Summary:

Writes to supply GA with an address for a reply to JH's 1840-5-16.

Contributor:
John Herschel Project

DCP-LETT-568

From:
Charles Robert Darwin
To:
John Washington; Royal Geographical Society
Date:
16 May 1840
Source of text:
Royal Geographical Society
Summary:

Has much pleasure "in accepting the honour of being proposed as a member of the Council of the Geographical Society".

Contributor:
Darwin Correspondence Project
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