Is a separate compartment in a waterway where water levels are raised or lowered

A lock is a separate compartment in a waterway where water levels are raised or lowered.

because it took place after the war of 1812 had come to an end.

copernicus finished the first manuscript of his book, "de revolutionibus orbium coelestium" ("on the revolutions of the heavenly spheres") in 1532. in it, copernicus established that the planets orbited the sun rather than the earth. he laid out his model of the solar system and the path of the planets.