What had originally been used to bleach clothing before the industrial revolution?why did this change?

Stale urine was used pre-industrial revolution to bleach clothing, this changed probably because bleach was just a better alternative (sorry I don't have your full answer but there is the first part if you want it)

Explanation:

congress was not thoroughly prohibiting states from funding religious schools.

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.