The Louisiana Purchase stretched from the Mississippi River to the beginning of the Rocky Mountains. Official boundaries were not determined, except that the eastern border ran from the source of the Mississippi River north to the 31 degrees north.
Cooled (or air conditioned) seats work by confining cooled air directly in the seat where the passenger is seated. Multiple fans are put within the seat to provide air circulation. The air from the fans blows through a diffusion layer to spread the cool air throughout the seating material, cooling the whole surface.
How a Thermostat Works. 1  When the engine is cold, the thermostats is normally closed; restricting flow to the radiator allowing the engine to âwarm upâ. 2  As the engine warms, the increase in heat causes the wax to melt and expand, pushing against a piston inside a rubber boot.