After telegraph lines were constructed over the course of the middle decades of the 19th century, a message and reply could make the circuit in just two days. The steamboat, with its power to travel b...After telegraph lines were constructed over the course of the middle decades of the 19th century, a message and reply could make the circuit in just two days. The steamboat, with its power to travel both with and against the flow of rivers, enabled Europeans to push into the interior of Africa (and many parts of Asia as well).
