The Forgotten Sanatorium That Was Cooled by Cave Air...
Before modern medicines were developed, the recomm... ...provided by air pumped up from Virginia's famous Luray Caverns . It was the culmination of years of work by heati... ...ng and ventilation engineer T.C. Northcott. The Luray Caverns had been discovered and opened to the public for... ...onstruct Limai...
https://www.neatorama.com/2017/12/28/The-Forgotten-Sanatorium-That-Was-Cooled-by-Cave-Air/
