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From:
Augustus De Morgan
To:
Sir John Herschel
Date:
[4 November 1859]
Source of text:
RS:HS 6.334
Summary:

Someone has experimented with sound and finds that the pitch of a note is altered when transmitted through solids; is this true in JH's experience? Supposes that Lady Herschel has now returned.

Contributor:
John Herschel Project