From:
Sir John Herschel
To:
Peter Mark Roget
Date:
[14 October 1843]
Source of text:
TxU:H/L-0340; Reel 1054
Summary:
Construction of JH's new instrument for photographing spectral lines is still incomplete, and A. E. Becquerel has already announced discovery. JH will return £100 granted to JH by R.S.L.
Contributor:
John Herschel Project