From:
Sir John Herschel
To:
John Herschel (son)
Date:
[14 July 1869]
Source of text:
TxU:H/L-0531; Reel 1053
Summary:
Glad for Mary's recovery. Congratulations on John's promotion to captain. Suggests method to study solar prominences without spectroscope. [Letter continues 15 June:] Alexander Herschel reports that G. B. Airy tried this method unsuccessfully long ago, but JH is sure it will work.
Contributor:
John Herschel Project