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Configliachi, Pietro in correspondent 
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From:
Sir John Herschel
To:
Pietro Configliachi
Date:
[21 September 1821]
Source of text:
WT 65659
Summary:

Asks PC for barometer readings for specific days in September, as JH was at the summit of Mount Rosa with a barometer. JH would also appreciate any other barometer readings around the foot of the mountain for those days. JH is on his way back to England.

Contributor:
John Herschel Project