The goal was to keep a political balance between slave states and free states.
He was unsure if the purchase was allowed by the constitution.
The earliest railroads did not have a locomotive- there were several that were built using gravity and mules to moves cars on a track. Among the earliest that actually used a locomotive was the Granite Railway in Quincy Mass (1826). It was 3 miles long, and used to move granite stone from a quarry.
The working class
Missouri & Maine. APEX.
high tariffs.
All of the Above
Improvements in iron and steel production
Interchangeable Parts
Made Napoleon willing to sell the Louisiana Territory. (apex)