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https://pure.psu.edu/en/publications/tilting-tables-george-pitkins-gravity-defying-spinal-anesthetic/ Tilting Tables: George Pitkin's Gravity-defying Spinal Anesthetic - Penn State tilting tables gravity defying george pitkin https://progress-is-fine.blogspot.com/2025/10/tilting-tables-were-all-rage-in-1930.html Progress is fine, but it's gone on for too long.: Tilting tables were all the rage in 1930