I 
ELECTRO-TINT * ENGRAVING • GO. 
726 Chestnut St., Philadelphia, Pa. 
Illustrator^ &aj EnfoLvers, 
Reproductions of Pen Drawings, Wood-cnt or Steel 
Prints, Lithographs, Etc. 
ENGRAVINGS IN RALF-T0NE. 
This work is gradually growing in favor with scientists and geologists. 
For faithful and accurate photographic representation of objects, such as 
meteorites and gems, 
IT HAS NO EQUAL. 
We shall be glad to furnish information, specimens and prices on application. 
Correspondents will oblige us by giving a clear and exact statement of just 
what they wish engraved. 
ELECTRO-TINT ENGRAVING GO. 
726 Chestnut Street, Philadelphia, Pa. 
