From:
James David Forbes
To:
Sir John Herschel
Date:
[3 February 1847]
Source of text:
St. Andrews LB IV, 193-5 (C: RS:HS 7.308)
Summary:
Comments, after delays due to busyness, on JH's queries on the calibration of actinometers and gives results of experiments.
Contributor:
John Herschel Project