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1840-1849::1840::06::05 in date 
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Herschel6881

From:
Augustus De Morgan
To:
Sir John Herschel
Date:
[5 June 1840]
Source of text:
RS:HS 6.184
Summary:

Possible to purchase 12 postage covers for 11d in the Strand. Points out an apparent error in one of JH's books on sound. How does an open pipe vibrate? Regarding the private character of J. L. Lagrange.

Contributor:
John Herschel Project

DCP-LETT-571

From:
Charles Robert Darwin
To:
John Maurice Herbert
Date:
[after 5 June 1840]
Source of text:
American Philosophical Society (Mss.B.D25.19)
Summary:

Writes to find whether the date of the event [JMH’s marriage?] has been fixed.

Has been unwell and does not yet feel up to work.

Contributor:
Darwin Correspondence Project
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