With the wonders modern medicine works every day, it's easy to forget how tough the early days of medicine were. Even as the scientific method informed the development of new drugs, techniques, and tools, there were plenty of quacks looking to cash in and few avenues to hold them to account. And there were mistakes. Lots of mistakes. For many patients, the cure was often as harrowing as the disease. So have a look at the photos below and be thankful that you're living in the 21st century.