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Herschel8558

From:
Sir John Herschel
To:
James Booth
Date:
[19 April 1839]
Source of text:
BostonPubLib Ch.I.6.34
Summary:

Translation of a work by C. F. Gauss and Wilhelm Weber will provide the information requested. Hopes [William Cranch] B[ond] will participate in magnetic observations. Explains 'Copper Dampers.'

Contributor:
John Herschel Project

Herschel8819

From:
Sir John Herschel
To:
William Henry Fox Talbot
Date:
[22 April 1839]
Source of text:
Science Museum Talbt 1/16 (C: RS:HS 22.11)
Summary:

Comments on several approaches to fixing images on paper, especially using pure water as a fixing agent. Has developed a new sensitive paper but is keeping it secret until perfected. Is leaving for Continent on 1 May.

Contributor:
John Herschel Project

Herschel8820

From:
Sir John Herschel
To:
William Henry Fox Talbot
Date:
[27 April 1839]
Source of text:
Science Museum Talbt 1/17 (draft 'altered': RS:HS 17.293a & C: RS:HS 22.12)
Summary:

JH reports his discovery of a highly sensitive paper. Tint continues to deepen with time, as bromine does not. Not prepared to reveal process at present. Is off to Paris.

Contributor:
John Herschel Project

Herschel9656

From:
Thomas Galloway
To:
Sir John Herschel
Date:
[22 April 1839]
Source of text:
RS:HS 8.6
Summary:

Forwarding Thomas Maclear's paper on N. L. Lacaille's Stations for JH's Report. Would he also mark any unnecessary passages or drawings.

Contributor:
John Herschel Project
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