In: who led the metis in the rebellions at red river in 1870 and in the northwest in 1885??

Out: Louis Riel


In: who led the revolt of 1857 in kanpur??

Out: Nana Sahib


In: when was the first mechanical cotton picker invented??

Out: the late 1920s


In: what does the r in hvacr systems refer to??

Out:
Refrigeration