In line with my comments the other day about science being a self-correcting discipline, and the continual change in so-called scientific "facts," I direct you to this new entry by Ed Willett on "self-corrections" in the medical profession. Vitalogy was a book published in 1899 that "attempted to contain within its 1000-plus pages 'the wisdom and experience, the best results of years of practical observation, of prominent and enlightened physicians, upon the simplest and most effectual methods of promoting health, overcoming disease and prolonging life.'" Weird and fairly amusing. Here's Ed's entry. Enjoy.