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.
Joseph James Coleman
Joseph James Coleman FRSE (often referred to simply as J. J. Coleman) (1838–1888) is credited with invention of a mechanical dry-air refrigeration process first used in the sailing ship ‘’Dunedin’’ and sometimes referred to (as a ship type) as Reefer ships. The process focussed upon the use of compressed air for its chilling effects. The effect, which also led to the development of air-conditioning, is known as the Bell-Coleman effect or Bell-Coleman Cycle.