[Michael Faraday and John Frederic Daniell.]
Photogravure with facsimile signatures. 165 x 140mm, 6½ x 5½".
A photographic portrait of two prominent English scientists working on electricity: Michael Faraday (1791-1867) who discovered electromagnetic induction, diamagnetism and electrolysis; and John Frederic Daniell (1790-1845), whose 'Daniell Cell' (1836) was a battery more efficient than voltaic cells.
[Ref: 27774] £190.00