"The refrigerator may seem mundane nowadays, but it is one of the wonders of twentieth-century science--lifesaver, food preserver, social liberator. Part historical narrative, part scientific decoder, Chilled looks at early efforts to harness the cold at the ice pits of Persia (Iranians still call their fridges the "ice pit") and ice harvests on the Regents Canal. As people learned more about what cold actually was, scientists invented machines for...