From:
Sir John Herschel
To:
James Thomas Walker
Date:
[24 December 1863]
Source of text:
RS:HS 18.12
Summary:
Received tables of heights recorded in 'Sind, the Punjab, N.W. Provinces, and Central Asia.' Sees scientific interest in JW's described effect of refraction on levelling. Work is important to irrigation.
Contributor:
John Herschel Project