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.
Apalachicola, Florida
In 1849, Apalachicola physician Dr. John Gorrie discovered the cold-air process of refrigeration and patented an ice machine in 1850. He had experimented to find ways to lower the body temperature of fever patients. His patent laid the groundwork for development of modern refrigeration and air conditioning, making Florida and the South more livable year round. The city has a monument to him, and a replica of his ice machine is on display in the John Gorrie Museum. The John Gorrie Memorial Bridge, originally built in 1935 and rebuilt in 1988, carries U.S. 98 across Apalachicola Bay to Eastpoint.