Plate XIII: Encysted tumour of the brain, from Robert Hooper's Morbid Anatomy of the Human Brain (1828). 14 more plates from the book, and many other wonderful vintage illustrations, can be viewed at Images from the Past.
(Via where else but the excellent - and now 1-year-old - Morbid Anatomy?)
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Ephraim Chambers
Cyclopaedia, 1728
If you're in New York tonight, head over to the mysterious new "Observatory" between Proteus Gowanus, Cabinet Magazine, and the Morbid Anatomy Library for
Andrew Wakefield, his claims to the contrary, is antivaccine to the core. To be honest, I’m not sure if he was always antivaccine.