"Writer telegraph" blackboard

In the second half of the 19th century, telegraphy became a cutting-edge technology with far-reaching effects on the economy and on society—just like smartphones and the Internet are having today. For the first time in history, real-time communication was possible—even across countries and continents. Therefore, telegraphy was also an important part of teaching in schools. Everyone had to understand how a telegraph worked and how the Morse alphabet was made up.