I went to Goodwill this morning to poke around. The best things I found were a couple of ancient WWI-era medical books. One called Physical Diagnosis from 1919 has a swell color illustration of a blue-skinned man suffering from argyria (who also kind of looks like Dale Earnhardt).
Argyria's that condition people get from drinking colloidal silver like that guy you've all probably seen on YouTube:
The other medical book I got is Text-Book of Operative Dentistry from 1918. It had once belonged to the Medical College of Virginia. Inside was a folded document that turned out to be an exam--from 1923.
Incidentally, the Medical College of Virginia still exists.