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Faraday1274

From:
César Mansuète Despretz
To:
Michael Faraday
Date:
12 May 1840
Source of text:
IEE MS SC 2
Summary:

No summary available.

Contributor:
Faraday Project

Herschel8272

From:
Sir John Herschel
To:
Elizabeth Drummond [Sr.]
Date:
[12 May 1840]
Source of text:
RS:HS 19.78
Summary:

Just moved [to Collingwood]. Will send information about ED's late son, Thomas Drummond. Recalls Drummond's fame and triangulation work on Irish Survey. Describes invention and first demonstration of Drummond Light.

Contributor:
John Herschel Project

Herschel3946

From:
Sir John Herschel
To:
Robert Hunt
Date:
[12 May 1840]
Source of text:
George Eastman House, 3.17 (C: RS:HS 22.15)
Summary:

Will forward RH's paper to the R.S.L.; intrigued by RH's results using mercury vapor to produce the image on exposed paper.

Contributor:
John Herschel Project

DCP-LETT-566

From:
Bartholomew James Sulivan
To:
Charles Robert Darwin
Date:
12 May 1840
Source of text:
DAR 177: 274
Summary:

Gives CD the results of some calculations for "dip" over different distances, as requested.

Contributor:
Darwin Correspondence Project
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