Air conditioning
In 1902, the first modern electrical air conditioning unit was invented by Willis Carrier in Buffalo, New York. After graduating from Cornell University, Carrier found a job at the Buffalo Forge Company. There, he began experimenting with air conditioning as a way to solve an application problem for the Sackett-Wilhelms Lithographing and Publishing Company in Brooklyn, New York. The first air conditioner, designed and built in Buffalo by Carrier, began working on 17 July 1902.
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.