From Open Culture:
In 2018 we brought you some exciting news. Thanks to a generous donation from Da Vinci Code author Dan Brown, Amsterdam’s Ritman Library—a sizable collection of pre-1900 books on alchemy, astrology, magic, and other occult subjects—has been digitizing thousands of its rare texts under a digital education project cheekily called “Hermetically Open.” We are now pleased to report that the first 2,178 books from the Ritman project have come available in their online reading room.
The language is archaic—full of quirky spellings and uses of the “long s”—and the content is bizarre. Those familiar with this type of writing, whether through historical study or the work of more recent interpreters like Aleister Crowley or Madame Blavatsky, will recognize the many formulas: The tracing of magical correspondences between flora, fauna, and astronomical phenomena; the careful parsing of names; astrology and lengthy linguistic etymologies; numerological discourses and philosophical poetry; early psychology and personality typing; cryptic, coded mythology and medical procedures.