Search: Herschel, John in correspondent 
Thomson, William in correspondent 
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1860-1869::1868 in date 
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From:
Sir John Herschel
To:
William Thomson
Date:
[11 August 1868]
Source of text:
RS:HS 17.351a (C: RS:HS 24.224)
Summary:

Comments on WT's paper on geological time. Unsatisfied with the efficiency of tidal friction in retarding the rotation of the earth. Considers effect of external attraction on a rotating body to relate to momentum.

Contributor:
John Herschel Project
From:
William Thomson
To:
Sir John Herschel
Date:
[24 September 1868]
Source of text:
RS:HS 17.351b
Summary:

Replies in detail to JH's objection to explaining the retardation of the earth's rotation as due to tidal friction, JH having urged that this effect should be analyzed in terms of momentum rather than of vis viva [kinetic energy], as WT maintained.

Contributor:
John Herschel Project