Air conditioning
Modern air conditioning emerged from advances in chemistry during the 19th century, and the first large-scale electrical air conditioning was invented and used in 1902 by US inventor Willis Carrier. The introduction of residential air conditioning in the 1920s helped enable the great migration to the Sun Belt in the United States.
Paul Elbridge Wright
Wright was responsible for the development of the first thermoelectric air conditioner with a coefficient of performance of greater than two. He was responsible for the first fossil-fuel, silicon germanium thermoelectric generator. Under Wright's direction, a magnesium-mercuric oxide battery was developed which exhibited an energy density of watt-hours per pound. During this time, Wright was also instrumental in developing technology for weather and other satellites. Some inventions at ATL were less successful, such as the video disc player and the bulls-eye UPC scanner.