[Texas Fossil]

“It should be noted that there was essentially no ((refrigerated)) air conditioning of any type in 1936.”

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Well, that is not exactly correct. 3,000 years ago Egyptians used evaporative cooling in a number of approaches.

Qanat were used in ancient times and could be connected with a shaft from the underground tunnels for cooling.

https://www.thecollector.com/ancient-egyptians-cooling-air-condition/

http://www.waterhistory.org/histories/qanats/

https://rashidfaridi.com/2014/11/21/qanatsunderground-aqueducts-a-reliable-source-of-water-in-arid-climate/

[spankalib]

Thanks for an educational, informative post.

(what makes FR great in fact)