From:
Sir John Herschel
To:
François N. M. Moigno
Date:
[18 July 1863]
Source of text:
DMC 695A.885.37
Summary:
Writes to FM to show several ways in which a series of prisms may be used in a spectroscope to have the light exiting in the same line as it entered the spectroscope. [Appends 4 pages of diagrams.]
Contributor:
John Herschel Project