- The following article is excerpted from J. Allan Hobson’s 2002 book “The Dream Drugstore: Chemically Altered States of Consciousness.” Hobson, a Harvard psychiatrist, pioneering sleep researcher, and prolific author, died in 2021.
- Ptolemy (Wikiquote)
Claudius Ptolemaeus (Greek: Κλαύδιος Πτολεμαῖος; c. 100 – c. 170), known in English as Ptolemy, was an ancient Greek geographer, astronomer, and astrologer who probably lived and worked in Alexandria, off the coast of Egypt.