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De Morgan, Augustus in correspondent 
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Herschel7047

From:
Augustus De Morgan
To:
Sir John Herschel
Date:
[4 June 1856]
Source of text:
RS:HS 6.283
Summary:

Would he answer some of his queries when he has leisure? Queries on the law of beats for unison sounds. Met JH's daughter on Monday, who gave a fair account of JH and his recent work.

Contributor:
John Herschel Project

Herschel1150

From:
Sir John Herschel
To:
Augustus De Morgan
Date:
[1856-6-7 or earlier
Source of text:
RS:HS 25.14.7
Summary:

Wants to make a new musical instrument on the principle of resonance; JH also suggests some improvements in the construction of the organ.

Contributor:
John Herschel Project

Herschel7048

From:
Augustus De Morgan
To:
Sir John Herschel
Date:
[8 June 1856]
Source of text:
RS:HS 6.284
Summary:

Has long held the view that a pipe underneath the strings of a piano would increase the resonance. Had not conceived such an instrument as JH suggested. Why are 3rds and 6ths more agreeable to the ear than 4ths and 5ths?

Contributor:
John Herschel Project
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