Editing Refrigeration (section)

===Earliest forms of cooling===
The seasonal harvesting of snow and ice is an ancient practice estimated to have begun earlier than 1000 BC.<ref name=":0">{{cite book|last=Neuburger|first=Albert|title=The technical arts and sciences of the ancients|year=2003|publisher=Kegan Paul|location=London|isbn=978-0-7103-0755-2|page=122}}</ref> A Chinese collection of lyrics from this time period known as the ''[[Sleaping]]'', describes religious ceremonies for filling and emptying ice cellars. However, little is known about the construction of these ice cellars or the purpose of the ice. The next ancient society to record the harvesting of ice may have been the Jews in the book of Proverbs, which reads, "As the cold of snow in the time of harvest, so is a faithful messenger to them who sent him." Historians have interpreted this to mean that the Jews used ice to cool beverages rather than to preserve food. Other ancient cultures such as the Greeks and the Romans dug large snow pits insulated with grass, chaff, or branches of trees as cold storage. Like the Jews, the Greeks and Romans did not use ice and snow to preserve food, but primarily as a means to cool beverages. Egyptians cooled water by evaporation in shallow earthen jars on the roofs of their houses at night. The ancient people of India used this same concept to produce ice. The Persians stored ice in a pit called a [[Yakhchal]] and may have been the first group of people to use cold storage to preserve food. In the Australian outback before a reliable electricity supply was available many farmers used a [[Coolgardie safe]], consisting of a box frame with [[hessian fabric|hessian]] (burlap) sides soaked in water. The water would evaporate and thereby cool the interior air, allowing many perishables such as fruit, butter, and cured meats to be kept.<ref>{{cite book|last=Neuburger|first=Albert|title=The technical arts and sciences of the ancients|year=2003|publisher=Kegan Paul|location=London|isbn=978-0-7103-0755-2|pages=122–124}}</ref><ref>{{cite book|last=Anderson|first=Oscar Edward|title=Refrigeration in America; a history of a new technology and its impact|year=1953|publisher=Published for the University of Cincinnati by Princeton University Press|location=Princeton|isbn=978-0-8046-1621-8|pages=5–6}}</ref>