From:
Sir John Herschel
To:
George Biddell Airy
Date:
[1843-9]
Source of text:
RS:HS 1.333 (C: RS:HS 25.13.12)
Summary:
Regarding custody of the Standards.
Contributor:
John Herschel Project
Showing 1–6 of 6 items
Regarding custody of the Standards.
Regarding the storage of the Standard weights and measures.
Makes some suggestions about possible storage places for the United States' standards [see GA's 1843-9-9].
Describes some available glass discs, which might do for making lenses for a large refracting telescope [see GA's 1843-8-30].
Requires information on an actinometer.
Gives formula for defining the measure of the scale of an actinometer.