briefly explain one specific technological advance that stimulated economic growth in the period 1840 to 1857. please help :)

How did critics view the judicial reform bill under roosevelt?

Which choice describes some of the difficulties john adams faced as presiden

Historians have recently discovered a historical journal published in the early twentieth century. the journal contains facts based on original sources about the downfall of the early byzantium empire. historians consider this long-lost journal to be a breakthrough in their understanding of the byzantium empire. based on this information, the journal is a source.