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John Herschel Project in contributor 
1860-1869::1864::01 in date 
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From:
Sir John Herschel
To:
Unidentified
Date:
[1864-1 or later]
Source of text:
TxU:H/L-0602.2; Reel 1089
Summary:

Encloses copy of JH's essay entitled The Yard, the Pendulum, & the Metre... (1863). Speculates on causes for deviation in pendulum measurements. Recommends using torsion gravimeters in 'proposed operation.'

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
Unidentified
Date:
[1864?]
Source of text:
JHS 5.2
Summary:

In response to the gift of a book, JH comments on the philosophy of knowledge, and goes on to say that JH agrees with [John Stuart ?] Mill's rejection of the syllogism as a means of argument. In the postscript, JH comments on the nature of heat.

Contributor:
John Herschel Project
Addressee
Document type
Transcription available