I’m curious about the really old ice boxes, but I was really wondering about the ones from the 1800s that relied on coolant and some form of evaporation.
I can’t really picture how old is physics work without electricity.
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Maybe you would like to have a look a this (cool) website [History of Refrigeration and Refrigerators](http://www.historyofrefrigeration.com/)
The idea for the refrigerator was invented back in 1755 by William Cullen who designed a machine that had a pump and a container of diethyl ether. It wasn’t really useable but it is the basis for modern refrigeration.
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