How did changes in manufacturing in the late 70s and early eighteen hundreds of people living in cities in the North

Northern manufacturing extended the use of power-driven machines to a wider range of commodities in the middle decades of the century. By 1860, the United States was second only to Great Britain and France in manufacturing. Stationary steam engines powering advanced machinery allowed factories to set up in the nation’s largest cities (1999.396). Affordable books and color prints from the new printing presses disseminated new fashions and ideas connecting urban and rural, East and West. By 1850, nine out of every ten adult white Americans could read, and millions bought books. Women in particular became prodigious readers, as well as the authors of many books and magazine articles (17.104).

Explanation:

regarding the law, the 15th amendment was specifically designed thinking in the rights of black free men.

even though ratified on february 3, 1870, the promise of the 15th amendment would not be fully applied for a long time.poll taxes and literacy tests would allow southern states disenfranchise african americans. only in 1965 the voting rights for african americans would be actually able to vote in the south.

in 1965, president johnson signed the voting rights act, which aimed to overcome legal barriers that prevented african americans from voting as it was guaranteed by the 15th amendment to the u.s. constitution.