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. Different car makers achieve this in different ways, but here is the most common method: The seat is made with more porous material than traditional car seats, which are made to allow air to flow through them.
How do air-conditioned seats work? Do they still use a central car air conditioner or is the air conditioner located in the seat itself? How does the air get out of the seat so that it can cool the person sitting in it? Can you buy air-conditioned seats for cars that don't have them built in?