Search: Herschel, John in correspondent 
Drummond [Sr.], Elizabeth in correspondent 
1840-1849 in date 
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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