Attended seminar at Bristol on algebraic topology; geometry and quantum mechanics; philosophy of Heraclitus, Aristotle, Democritus, Parmenides, Zeno’s paradox – atoms and motion; molecular biology and quantum mechanics; publication of Causality and Chance in Modern Physics; necessity and contingency; correspondence with Charles Biederman; evolution of art; Impressionism and quantum mechanics; Alfred Korzybski, Science and Sanity; Biederman and Krishnamurti’s views on societal conditioning.