Persia fridge n Ice ? "The walls were made out of a type of mortar called Sarooj a mixture composed of sand, clay, egg whites, lime, goat hair, and ash in very specific proportions."
"This mortar was resistant to heat transfer and it was also thought to be completely waterproof."
#Ice
https://www.thevintagenews.com/2016/09/30/ancient-persia-engineers-developed-type-wind-water-cooled-ice-house-keep-contents-frozen-even-desert-summer-2/
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