 On mountainsides, runoff from melting snow is a convenient way to cool drinks, and during the winter one can keep milk fresh much longer just by keeping it outdoors.The word "refrigeratory" was used at least as early as the 17th century
The history of artificial refrigeration began when Scottish professor William Cullen designed a small refrigerating machine in 1755.Cullen used a pump to create a partial vacuum over a container of diethyl ether, which then boiled, absorbing heat from the surrounding air.