PLATE I.
Photo-Lithographed by Robt J Cook & Hammond Charing Cross & Westminster
VIEW OF A SIEMENS' APPARATUS (GERMAN)
PLATE II.
Lithographed by Robt J Cook & Hammond Charing Cross & Westminster
SIEMENS' APPARATUS (ENGLISH PATTERN)
PLATE I.
Photo-Lithographed by Robt J Cook & Hammond Charing Cross & Westminster
VIEW OF A SIEMENS' APPARATUS (GERMAN)
PLATE II.
Lithographed by Robt J Cook & Hammond Charing Cross & Westminster
SIEMENS' APPARATUS (ENGLISH PATTERN)