William Cullen, Oliver Evans, Jacob Perkins

The first artificial refrigeration was demonstrated by William Cullen at the University of Glasgow in 1748. In 1805, an American inventor, Oliver Evans, designed the first refrigeration machine. The first practical refrigerating machine was built by Jacob Perkins in 1834; it used ether in a vapor compression cycle.

Quote by Wendy Deng Murdoch

I had never been in a supermarket before coming to America. At home, my parents wouldn't let me open the refrigerator, because they worried I'd damage the door by opening it too many times.
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