A British medical doctor, Nahaniel Henshaw, proposed what would have been the main hyperbaric chamber for medical treatment of people in 1662. The metal container was to have been pressurised with air, which at time wasn't nonetheless recognised to comprise oxygen, afterwards discovered by Carl Wilhelm Scheele about 1770 and https://hyperbaric-chamber-cost-u01841.wssblogs.com/36336710/not-known-facts-about-cost-hyperbaric-oxygen-chamber