From:
Sir John Herschel
To:
Friedrich Wilhelm Bessel
Date:
[29 December 1839]
Source of text:
AdWDDR Bessel 225 (C: RS:HS 22.35)
Summary:
Thanks FB for a variety of observational material, including establishment of standards of measurement [letter completed 1840-1-3].
Contributor:
John Herschel Project