Phonoplex telegraph invented by Thomas Alva Edison (1847-1931). Engraving.

19 CENTURY • 19TH CENTURY • 19TH CENTURY. • 19TH • 19TH-CENTURY • AMERICA NORTH • AMERICA • AMERICA. • AMERICAN • AMERICANS • AMERICAS • AMERICAS, THE • ARTFORM • CIENCIA • COLORED • COLOURED • COMMUNICATE • COMMUNICATIONS • CONTEMPORARY AGE • CONTEMPORARY DECADE • CONTEMPORARY EPOCH • CONTEMPORARY HISTORY • DESIGN • DEVISER • EDISON • EDISON, THOMAS ALVA • EE. UU. • EEUU • ELECTRIC • ELECTRICAL • ENGINEERING • ENGRAVED • ENGRAVING (ARTWORK) • ENGRAVING • ENGRAVING. • ENGRAVINGS • ESTADOS UNIDOS USA EEUU EE. UU. EUA E. U. A. • ETCHING • FICTION • FONOPLEX • HISTORIA UNIVERSAL • HISTORIA • HISTORY • HISTORY. • INVENT • INVENTION • INVENTIONS • INVENTOR (MALE) • INVENTOR • KNOW-HOW • MESSAGE • NINETEENTH CENTURY • NORTH AMERICA • NORTH AMERICAN • ORIGINATOR • PHONOPLEX • PRINT • SCIENCE • SCIENCES • TECHNICAL • TECHNIQUE • TECHNOLOGY • TEHNOLOGY • TELECOMMUNICATION • TELECOMMUNICATIONS • TELEGRAPH • TELEGRAPHIC • TELEGRAPHS • TELEGRAPHY • U S A • U. S. A • U. S. A. • U.S. • UNITED STATES AMERICA • UNITED STATES OF AMERICA • UNITED STATES • UNITED STATES, THE • UNITES STATES OF AMERICA USA • USA • USA. UNITED STATES • XIX CENTURY